Western Gateway of the Fortress of Serdica (Sofia)

 ancient, archaeological site, cultural heritage / national heritage, historic ruins

Among the most significant constructions built in the first centuries of the Roman dominion was the fortified wall. It was finished around 176 - 180 A.D. during the co - rule of Marcus Aurelius and Lucius Aurelius Commodus Antoninus. The wall was destroyed not until the Ottoman conquest. The space inside the walls wasn't enough at some point and many buildings were built outside them. The form of the walls is rectangle and lengthened along the north - south axe with digression from the cardinal points to the northeast and cut northwest corner. There are different hypothesis about the reason for this cut out of the traditional rectangle roman settlements - presence of a river or already existing Thracian urbanization. From East the city is restrained from high geological terrace (now Alexander Battenberg square).

ulpiaserdica.com/west_gate_en.html
www.visitsofia.bg/en/cityinfrastructure/what-to-see/arc...
travelfinder.bg/places/bulgaria/sofia/attractions/west-...