The main building of the Hansa Gymnasium situated on the Hansaring was built in 1901 according to plans drawn up by the then director of the City of Cologne’s public works and surveyors office, the architect Friedrich Carl Heimann. The building formerly used by the business school and the university as well as the Hansa Gymnasium from 1926 onwards is one of the few remaining representational buildings on Cologne’s orbital Ringstra¬ße from the period of promoterism. The three-storey extension situated in the Ritterstraße was built in the 1950s. Today, the building is used by the Unesco Project School Hansa Gymnasium during the day and by the adult education centre during the evenings.