The Tscheligi Tower is the only still preserved tower of the five original towers on the northern defence wall.. Also known as the Black Tower it got this name from the renowned Maribor Tscheligi brewery. Built between 1460-1465 this stone building, which is almost square in shape, is today surrounded by newly built blocks of flats. Nearby, at the corner of the streets Gregorčičeva and Gledališka ulica, stands the likewise connected to beer building of the former Gambrinus restaurant and hall. The building was named after the legendary Flanders' king, King Gambrinus, who is supposed to have invented the process of brewing beer.