The Peribleptos Monastery is a late Byzantine-era monastery in Mystras, Greece. It was probably built in the mid-14th century by the first Despot of the Morea, Manuel Kantakouzenos, and named after one of the most celebrated monasteries of Byzantine Constantinople. The Monastery is built into the side of a cliff with a cave supporting the structure. This architectural style is known as the Mystras style and is prevalent in several churches and monasteries in the area, this style is typified by a resemblance to a castle. It is constructed of squared stones with inlaid tiles. The complexity and unique variations of the shape of the structure of the exterior create an interior surface inside the monastery that lends itself to the ethereal quality of the frescoes covering the walls.
The frescos in the main church, dating between 1348 and 1380, are a very rare surviving late Byzantine cycle, are crucial for the understanding of Byzantine art. These works have been connected with the Cretan and Macedonian art schools.
The relics include a fresco of Saint John the Baptist in a scene of The Baptism of Christ. Another notable relic is the head of Saint Gregory of Nazianzus, 4th-century Archbishop of Constantinople.References:
The Basilica of Santa Maria in Trastevere is one of the oldest churches of Rome. The basic floor plan and wall structure of the church date back to the 340s, and much of the structure to 1140-43. The first sanctuary was built in 221 and 227 by Pope Callixtus I and later completed by Pope Julius I.
The inscription on the episcopal throne states that this is the first church in Rome dedicated to Mary, mother of Jesus, although some claim that privilege belongs to the Basilica di Santa Maria Maggiore. A Christian house-church was founded here about 220 by Pope Saint Callixtus I (217-222) on the site of the Taberna meritoria, a refuge for retired soldiers. The area was made available for Christian use by Emperor Alexander Severus when he settled a dispute between the Christians and tavern-keepers.
The church underwent two restorations in the fifth and eighth centuries and in 1140-43 it was re-erected on its old foundations under Pope Innocent II.