CPH:DOX at The Round Tower: “The Peace Particle” + Live Event on CERN
Join the documentary film festival CPH:DOX this March as it presents films from its science programme in the Library Hall at The Round Tower. On 22 March, you can experience The Peace Particle by Alex Kiehl, followed by a panel discussion on science for peace featuring, among others, Jeffrey Hangst, researcher at Aalborg University and CERN.
CPH:DOX is Copenhagen’s international documentary film festival, presenting some of the strongest documentary films from Denmark and abroad each year at various venues across the city. As part of LYSÅR 2026, you can experience films from its science section in the historic Library Hall at The Round Tower, temporarily transformed into a festival cinema. Over the years, the Library Hall has housed everything from the book collection of the University of Copenhagen and storage for the Zoological Museum to a range of exhibitions on science and history.
FILM: The Peace Particle
After the atomic bomb was dropped on Hiroshima, many scientists vowed never again to use their knowledge for warfare. These researchers went on to found CERN and built the world’s largest machine in pursuit of the universe’s smallest particles. With rare access to the groundbreaking Large Hadron Collider and Nobel Prize-winning scientists, The Peace Particle pays tribute to CERN as it faces its greatest challenge since its founding in 1954: today’s threat of yet another world war.
The film runs for 86 minutes and will be followed by a talk.
LIVE EVENT: Science for Peace – A Conversation about CERN at The Round Tower
At a time when peace and international cooperation can seem elusive, the scientists at CERN remind us of one essential truth: collaboration is still possible. Join CPH:DOX and The Round Tower for a conversation about research and peace, and how the search for the universe’s smallest particles can remind us of our shared humanity.
Meet, among others, physicist and contributor to The Peace Particle, Jeffrey Hangst (AAU), founder of the ALPHA collaboration at CERN.
Look forward to a unique experience where film about science is enriched by the historic atmosphere of the Tower. Your film ticket naturally includes access to the rest of the Tower, allowing you to explore current exhibitions in the Library Hall, the iconic Spiral Ramp, the Hollow Core, the Bell Loft, and enjoy panoramic views of the city’s spires, towers, and rooftops from the top.
The screenings are part of the LYSÅR 2026 programme at The Round Tower – a year-long celebration of light and the 350th anniversary of Ole Rømer’s groundbreaking discovery of the speed of light.
Finissage: Crystalline Memories of Deep Time
Artist Claus Spangsberg creates fascinating images at the intersection of art and science. Meet him in the exhibition on its very last day.
Claus Spangsberg specializes in microscopy and crystallization, creating images using chemical substances, DNA, and amino acids. In the exhibition Crystalline Memories of Deep Time, he explores some of the oldest materials known to us and presents various meteorites and components from the biochemical processes of the primordial soup. Materials such as crystallized sulfur, amino acids, and enzymes are presented as large-scale microscopic images or displayed in specially constructed screens with polarizing filters, allowing beautiful colors and patterns to emerge from the materials’ structures.
Meet Claus on the final day of the exhibition, when you will have the opportunity to ask questions about the works, be guided through the exhibition, and hear more about his artistic process.
The exhibition is supported by
Grosserer L.F. Foghts Fond
Den Hielmstierne-Rosencroneske Stiftelse
Knud Højgaards Fond
Poul Johansen Fonden
Lizzi og Mogens Staal Fonden
OVODAN BIOTECH
Københavns Kommune – Rådet for Visuel Kunst
Winter Light Bar
Experience the top of the Round Tower like never before, as the platform transforms into a glowing winter bar!
The view from Rundeaarn’s platform at nearly 35 metres above the ground is something truly special – even in winter.
We’re braving the cold and turning up the atmosphere when the platform is transformed into a glowing winter bar on 28 February. The music will be provided by Future Female Sounds, and with Maria Kabar behind the DJ booth, the audience is guaranteed a festive evening.
In February, the Round Tower turns up the light, as the platform becomes a radiant winter bar. There will be music and a bar that will offer beer and bubbles, as well as drinks such as “Light and Stormy” or “Glow & Tonic.” Enjoy your drink while exploring Yoke’s light installation “While the Light Hesitates” at the top, inspired by Ole Rømer’s discovery of the delay of light.
We recommend that guests bring extra warm clothing and dance to keep warm, but if that isn’t quite enough, blankets will be available to borrow.
The Library Hall will also be open. Here, you can experience the newly opened exhibition Ad Lucem, as well as the Round Tower’s historical exhibition about Ole Rømer and his discovery of the hesitation of light.
Access to the winter bar is included in the regular admission, but be aware that if interest is very high, queues may form, as the Viewing Platform allows a limited number of visitors at a time.
The event is part of the program for LIGHTYEAR 2026 at the Round Tower — a full year in which we celebrate light and the 350th anniversary of Ole Rømer’s groundbreaking discovery of the speed of light.
Concert: Ars Nova – To Love
Join the Ars Nova concert in the Round Tower and experience the internationally acclaimed vocal ensemble celebrate love in all its forms through a rich and expressive vocal repertoire, ranging from intimate closeness to universal longing.
Several of the pieces draw inspiration from the Song of Songs, but the program also features texts by James Joyce and Shakespeare, as well as tones from the Renaissance and contemporary compositions – all lovingly interpreted by the skilled vocal ensemble.
The concert brings together music that, through the centuries, has been created in the name of love. A beautiful journey through love’s many facets, to be enjoyed either alone or with someone dear to you.
Ars Nova Copenhagen was founded in 1979 and has long since established itself as one of the world’s finest vocal ensembles. The group specializes in interpreting Renaissance polyphonic choral music and new vocal works, performed with precision and emotion, and with a sound that draws attention around the globe.
The concert will take place in the historic Library Hall, where you can also view the current exhibition The Shadow Archive. Drinks will be available for purchase, and you’re welcome to end the evening with a trip to the top of the tower to enjoy the nighttime view over Copenhagen.
This event is part of the Golden Days Festival (September 5–21). The theme is ‘Love’, which you will also be able to feel at the Round Tower. Follow September’s love events right here.
Drop in-proposal at The Round Tower
Are you planning to get down on one knee before the love of your life? Why not do it with Copenhagen’s most charming view as the backdrop for your unforgettable moment of love?
In celebration of the Golden Days Festival, Rundetaarn is turning up the romance and exclusively inviting you to drop-in proposals outside regular opening hours. For the very first time in Rundetaarn’s history, you can ask your beloved the big question in the historic and romantic setting of Rundetaarn — completely undisturbed by tourists or other guests.
It’s free, and you can book a time slot between 8:00–9:00, 9:00–10:00, or 20:00–21:00 during the period from September 5th to 21st.
This event is part of the Golden Days Festival (September 5–21). The theme is ‘Love’, which you will also be able to feel at the Round Tower. Follow September’s love events right here.
Astro Bar in September – Fall sunset and drinks with a view
Explore the art exhibition and enjoy a 360-degree sunset over Copenhagen with drinks and music, as the Round Tower stays open late and transforms its rooftop into a cozy Thursday bar.
Take a leisurely walk up the Spiral Ramp hand in hand with your sweetheart or best friend, make a stop halfway in the Library Hall to explore the current special exhibition, and finish your visit on top of the Round Tower with drinks, music, and a summer sunset.
On September 18th, the tower will stay open late in both the exhibition hall and on the rooftop, as we swap souvenirs and ice cream in the rooftop kiosk for beers and cocktails and invite you to Astro bar – the city’s most scenic bar with an unbeatable view.
This means that with a single ticket, you can explore the exhibition in the Library Hall, get help from astronomers to look through the telescope in the Observatory, and enjoy the last rays of sunshine setting over the city from the viewing platform on top.
Please note: Tickets are sold in advance due to limited space, but it is also possible to buy a ticket at the door if capacity allows.
If the weather doesn’t allow for an open-air event, we’ll move the festivities inside the Round Tower.
A beacon of light – Concert with Di Garbi
The Round Tower is transformed into a beacon of light, prayer and compassion, as we join Danish composer and pianist Di Garbi on a pilgrimage through the tower and gather for a concert in the final hours of the sun.
The audience is invited to a special evening where music and song will spread universal love – for each other and for the planet. The empty Library Hall in the Round Tower will set the scene for the concert, where Di Garbi, with her classical roots and poetic musical language, will perform beautiful compositions on the grand piano placed at the center of the space.
Di Garbi has a special focus on historical spaces from a time when architecture imposed different demands on sound.
The audience can enjoy this unique, almost ritual-like, experience seated on chairs and cushions around the piano in the historic hall at the heart of the Round Tower. A sense of unity and togetherness will arise as Di Garbi invites everyone to sing along to various mantras – both around the piano and in the Spiral Ramp.
After the concert, guests will have the opportunity to walk up and enjoy the view over Copenhagen – and perhaps catch a glimpse of the day’s last light.
Multi-artist Di Garbi
As a composer, singer, lyricist, and pianist, Di Garbi is a versatile musician who transforms historical spaces into the most enchanting concert halls through melodic music of classical, electronic, and cinematic character. Her compositions explore the human mind in a poetic musical language, often with a calming effect on the listener’s nervous system. In 2024, Di Garbi became the first Danish solo artist ever to record an album at Abbey Road’s Angel Studio in London.
Previously, Di Garbi has performed as artist-in-residence at venues such as Thorvaldsens Museum, the Royal Chapel at Christiansborg Palace, and Aarhus Theatre. Now, audiences can immerse themselves in her musical universe here in the Round Tower. We look forward to welcoming you.
We meet at the entrance to the tower and embark together on a shared pilgrimage to the Library Hall. Doors open half an hour before the concert begins.
A special thanks
Di Garbi are joined by three special guests:
Cæcilie Balling, violinist
Bilal Irshed, oudist
Stine Ciconia Rejnholdt, reading and text
The artistic team behind the concert also includes:
Marie Nørgaard Nielsen, costume designer
Glenn Rottland, MOTU, sound and setup
Stine Ciconia Rejnholdt, production assistant
Astro Bar in July – Drinks on the top of The Round Tower
Explore the art exhibition and enjoy a 360-degree sunset over Copenhagen with drinks and music, as the Round Tower stays open late and transforms its rooftop into a cozy Thursday bar.
Take a leisurely walk up the Spiral Ramp hand in hand with your sweetheart or best friend, make a stop halfway in the Library Hall to explore the current special exhibition, and finish your visit on top of the Round Tower with drinks, music, and a summer sunset.
On July 24th, the tower will stay open late in both the exhibition hall and on the rooftop, as we swap souvenirs and ice cream in the rooftop kiosk for beers and cocktails and invite you to Astro bar – the city’s most scenic bar with an unbeatable view.
This means that with a single ticket, you can explore the exhibition in the Library Hall, get help from astronomers to look through the telescope in the Observatory, and enjoy the last rays of sunshine setting over the city from the viewing platform on top.
Please note: Tickets are sold in advance due to limited space, but it is also possible to buy a ticket at the door if capacity allows.
If the weather doesn’t allow for an open-air event, we’ll move the festivities inside the Round Tower.
Astro Bar in August – Stargazing and music in The Round Tower
Explore the art exhibition and enjoy a 360-degree sunset over Copenhagen with drinks and music, as the Round Tower stays open late and transforms its rooftop into a cozy Thursday bar.
Take a leisurely walk up the Spiral Ramp hand in hand with your sweetheart or best friend, make a stop halfway in the Library Hall to explore the current special exhibition, and finish your visit on top of the Round Tower with drinks, music, and a summer sunset.
On August 21st, the tower will stay open late in both the exhibition hall and on the rooftop, as we swap souvenirs and ice cream in the rooftop kiosk for beers and cocktails and invite you to Astro bar – the city’s most scenic bar with an unbeatable view.
This means that with a single ticket, you can explore the exhibition in the Library Hall, get help from astronomers to look through the telescope in the Observatory, and enjoy the last rays of sunshine setting over the city from the viewing platform on top.
Please note: Tickets are sold in advance due to limited space, but it is also possible to buy a ticket at the door if capacity allows.
If the weather doesn’t allow for an open-air event, we’ll move the festivities inside the Round Tower.
Astro Bar x Art Matter: Culture and drinks in the Round Tower
Explore the current exhibition and enjoy a 360-degree sunset over Copenhagen with drinks and music at the Round Tower’s exclusive Thursday bar.
Walk up the Spiral Ramp hand in hand with a loved one, stop halfway at the Library Hall to explore the current exhibition and end your visit at the top of the Round Tower with drinks and music.
On May 22nd the tower will be exceptionally open in both the Library Hall and the rooftop, as we swap souvenirs and ice cream at the rooftop kiosk for beers and cocktails and invite you to Astro Bar – the city’s most scenic bar with an unbeatable view.
With your ticket you can explore the exhibition in the Library Hall, get assistance from astronomers to look through the telescope in the Observatory, and enjoy the sun setting over the city from the rooftop platform.
Since space is limited, tickets are available for pre-sale, but if capacity allows, you can also purchase tickets at the entrance.
Please note:
If the weather does not allow for an open-air event, we will move the gathering indoors.