If you have already walked through Sofia and met with its modern appearance, you can stroll and antique Sofia, Serdica more precisely. The buildings related to the Serdika complex can be viewed between the presidential administration and the building of the Council of Ministers. You can get there by metro to Serdika station. In the area of the metro station once were the homes of aristocrats with running water and sanitation. And to the place under the Square of Light Week were two main city streets.