Isova
Isova is the site of a ruined Frankish monastery near the modern village of Trypiti in the western Peloponnese, Greece. The church of Notre Dame at Isova, built in the first half of the 13th century, is among the best surviving examples of Gothic architecture in the Peloponnese, along with the church of Saint Sophia at Andravida and the monastery of Zaraka at Stymphalia.
Foundation
The Frankish monastery at Isova was founded some time after 1205, when the French Principality of Achaea was created in southern Greece in the wake of the Fourth Crusade, and before 1263, when the abbey was destroyed by fire. Although the religious order responsible for the monastery is not recorded, it is now generally believed to have been a Cistercian foundation. The Cistercians were active in the Fourth Crusade and established at least a dozen abbeys in Byzantine territories captured by the Crusaders, and there is archival evidence that specifically suggests Cistercian involvement in two monastic foundations in the Peloponnese itself during the early 13th century. One of these two Cistercian abbeys in the Peloponnese can be identified with certainty as the monastery of Zaraka at Stymphalia, in the archdiocese of Corinth. For the other, the monastery at Isova, in the archdiocese of Patras, appears to be the only known candidate.Architectural remains
Notre Dame
The abbey church of Notre Dame consisted of single large rectangular hall, ca. 38.5 m long by 12.5 m wide, with a chancel at the eastern end projecting an additional ca. 8 m and ending in an octagonal apse supported by six external buttresses. The west and north walls are nearly intact; the south wall is partially destroyed and the east end is barely preserved above the foundations. There is no evidence of internal supports dividing the interior into nave and aisles, and no narthex or transept. The triangular gable of the west wall preserves the profile of the steeply pitched wooden roof, which apparently covered the entire width of the main hall in a single span, presumably with trusses, which were supported on simple corbels ca. 4 m apart in the side walls. A reused fragment of rib vaulting built into the wall of the later church of Saint Nicolas suggests that the chancel was roofed with a stone vault. The well-preserved windows in the north wall are single lancets topped by ogival arches. The west wall had two slightly larger windows below and a single much larger one in the gable. A small fragment of stone tracery found nearby may indicate that the windows in the chancel were larger and more elaborate, with two lights surmounted by a cinquefoil. Traces of abutting walls and supports for floor and roof beams in the exterior north wall of the church show that the cloister and other monastery buildings were located on that side, although no remains of these are visible today. In plan, architectural style, and construction technique the church belongs entirely to the western European Gothic tradition, without any sign of Byzantine influence, and it has been suggested that it was not merely designed but actually built by western craftsmen, if not by the monks themselves.According to the 14th-century Chronicle of the Morea, the church was destroyed by fire in 1263, shortly before the battle of Prinitza, by a band of Turkish mercenaries fighting alongside Greek forces in an attempt to restore Byzantine control over the Peloponnese.