Behind Cankarjev Dom, the city’s premier cultural and conference centre, is this important site, with the remains of an early Christian church portico with mosaics from the 4th century, a total-immersion baptistery and hypocaust system. Opposite and to the west of the Cankarjev Dom are the remains of a Roman wall dating from 14–15 AD. The city's northern gate is closer to Kongresni trg.
