The so-called Great Basilica was the principal church in late antique Butrint and sections of a 6th century mosaic floor are still preserved. The church was erected on the site of a cistern belonging to the Roman city’s aqueduct and is over 30m long. It followed the characteristic plan and architectural devices prevalent throughout Epirus, employing a central nave flanked by aisles that were screened from the nave by closed colonnades.
At the east end was a tripartite transept and a central pentagonal apse. Remains of the mosaic pavement include trailing ivy tendrils and scrolling guilloche that are also found in the Baptistery, indicating that these two religious monuments are broadly contemporary. The devices are characteristic of mosaicists working in Nikopolis in northwestern Greece. Some time later, most likely in the 13th century when Butrint began to boom once more, the Great Basilica was extensively rebuilt and effectively became Butrint’s cathedral.References:
The city walls of Avila were built in the 11th century to protect the citizens from the Moors. They have been well maintained throughout the centuries and are now a major tourist attraction as well as a UNESCO World Heritage Site. Visitors can walk around about half of the length of the walls.
The layout of the city is an even quadrilateral with a perimeter of 2,516 m. Its walls, which consist in part of stones already used in earlier constructions, have an average thickness of 3 m. Access to the city is afforded by nine gates of different periods; twin 20 m high towers, linked by a semi-circular arch, flank the oldest ones, Puerta de San Vicente and Puerta del Alcázar.