Rothenburg 12/13, Historical house in Münster, Germany.

Rothenburg 12/13 is a protected residential house in Münster that displays traditional construction methods and materials from earlier times. The building retains its original structural elements and features today.

The World Time Clock at Rothenburg 12 was created on the initiative of watchmaker Wilhelm Nonhoff, who had planned a large outdoor clock for his business house for over twenty years. Architect Heinrich Benteler designed the facade, Korfhage & Söhne of Melle built the mechanism, and it was inaugurated on 26 November 1950. In 1961–63 the house was raised and the clock extended with a tower of figures; Nonhoff died in December 1962 and his son Wilhelm and daughter-in-law Rosmarie completed it in June 1963.

The clock's ten side dials show world times through embossed copper reliefs: Moscow's St Basil's Cathedral, Shanghai with pagodas and a dragon, Sydney's harbour bridge, and London's Tower Bridge with Big Ben. The Westminster chime of Big Ben also rings from Münster's clock. The weekday dial shows classical deities.

The house sits on Rothenburg street and is easy to reach by public transportation, with several bus stops nearby. You can view the building from the street and observe the details of its facade.

At the inauguration on 26 November 1950 the clock's hands did not move: the master clock's impulses never reached the first floor. An apprentice was squeezed into the casing and turned the hands by hand every minute while the guests watched.