Fort X (meaning 10) is an old Prussian brick fortress, built between 1816 and 1840. It is the only one of seven fortifications which still survives in Cologne. After the end of its military role, a rose garden was planted, which gave the whole edifice a romantic touch. Just as contrary to the original purpose of the fort, it is presently used by Cologne's bands for rehearsals as well as, from time to time, for performances.