 There were Roman settlements (from around 50-200 AD) in what is now the Old Part of the city, according to excavations carried out in the convent of Santa Teresa, on the slopes of Urgull.San Sebastián is thought to have been in the territory of the Varduli in Roman times.east of the current city lay the Basque Roman town of Oiasso (Irun), which was for a long time wrongly identified with San Sebastián.