The Kavilda stronghold (Kawelecht) was, according to Leonhard von Stryk, first built in 1354 by Bartholomäus von Tiesenhausen. Other sources say it was built in 1361 by Arnold von Vietinghoff, the Master of Livonian Order. The castle was destroyed during the Livonian War somewhere between 1564 and 1582. It was probably knocked down before the invasion of the Poles. Thereinafter Kavilda excisted only as a manor but not as a castle.
The castel was a castellum-like building with a tower-shaped residential building. Nowadays only one and a half floors have remained, most of it under the ground.
References:Saint-Georges de Boscherville Abbey is a former Benedictine abbey. It was founded in about 1113 by Guillaume de Tancarville on the site of an earlier establishment of secular canons and settled by monks from the Abbey of Saint-Evroul. The abbey church made of Caumont stone was erected from 1113 to 1140. The Norman builders aimed to have very well-lit naves and they did this by means of tall, large windows, initially made possible by a wooden ceiling, which prevented uplift, although this was replaced by a Gothic vault in the 13th century. The chapter room was built after the abbey church and dates from the last quarter of the 12th century.
The arrival of the Maurist monks in 1659, after the disasters of the Wars of Religion, helped to get the abbey back on a firmer spiritual, architectural and economic footing. They erected a large monastic building one wing of which fitted tightly around the chapter house (which was otherwise left as it was).