Tycho Brahe has never set foot in the Round Tower, which was not finished until long after the world-famous Danish astronomer had died in exile in Prague. Yet there is a direct line from Tycho Brahe to the Observatory at the top of the tower.

Nine loads of decomposed dung were removed, when a sealed holding tank under the Round Tower was emptied, containing the waste from the tower's two original privies. But also in the privies themselves, the stench was tangible. We have restored the one in the Spiral Ramp next to the Library Hall.