The TK Elevator Test Tower (TK-Elevator-Testturm) is an elevator test tower in Rottweil, Germany. It is owned by TK Elevator, who have their elevator research campus nearby. It stands tall and was built to test the company's MULTI elevator system. At , the tower contains Germany's tallest observation deck. Completed in 2017, it was then the tallest elevator test tower in the world, as well as the second-largest elevator test chamber (next to a former mine shaft used by Kone).