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 Chapel of St. Martin is the only completely preserved Romanesque building in Vyšehrad and one of the oldest in Prague. In was built around 1100 in the eastern part of the fortified outer ward. Between 1100 and 1300, the Rotrunda was surrounded by a cemetery. The building survived the Hussite Wars and was used as the municipal prison of the Town of the Vyšehrad Hill.
During the Thirty Years’ War, it was used as gunpowder storage, from 1700 to 1750, it was renovated and reconsecrated. In 1784, the chapel was closed passed to the military management which kept using it as a warehouseand a cannon-amunition manufacturing facility. In 1841, it was meant to be demolished to give way to the construction of a new road through Vyšehrad. Eventually, only the original western entrance was walled up and replaced with a new one in the sountren side. The dilapidating Rotunda subsequently served as a shelter for the poor.