The Dominican monastery was founded in 1246 and it is the oldest one in the medieval old town. The center of monastery was St. Catherine's Church, which was completed in the late 1300s and was the largest church building in the lower town. The Monastery was expanded several times, most recently in the 16th century.
St. Catherine's convent closed down in 1525, when the monks were expelled from Tallinn during the Reformation. The looted and empty monastery church was destroyed by fire in 1531 - only ruins were left.
There were originally three inner chambers (together so-called claustrum) in the monastery allowed only for residents. The claustrum housed the most important rooms in the monastery: the prior’s room, the old library, the chapter hall, the dormitory, the sacristy, the cloister and the vestry. In the 14th and 15th centuries the leaders of the knight guilds of Harju and Virumaa often used the claustrum as their meeting and gathering place.
Only the eastern chamber has been preserved to our days. The dormitory, library, dining room and other rooms provide a fascinating opportunity to take a peek into the life of medieval monks. A mysterious "energy column" is located in the basement. According the legend it can be a source of physical and mental well-being.
Angelokastro is a Byzantine castle on the island of Corfu. It is located at the top of the highest peak of the island"s shoreline in the northwest coast near Palaiokastritsa and built on particularly precipitous and rocky terrain. It stands 305 m on a steep cliff above the sea and surveys the City of Corfu and the mountains of mainland Greece to the southeast and a wide area of Corfu toward the northeast and northwest.
Angelokastro is one of the most important fortified complexes of Corfu. It was an acropolis which surveyed the region all the way to the southern Adriatic and presented a formidable strategic vantage point to the occupant of the castle.
Angelokastro formed a defensive triangle with the castles of Gardiki and Kassiopi, which covered Corfu"s defences to the south, northwest and northeast.
The castle never fell, despite frequent sieges and attempts at conquering it through the centuries, and played a decisive role in defending the island against pirate incursions and during three sieges of Corfu by the Ottomans, significantly contributing to their defeat.
During invasions it helped shelter the local peasant population. The villagers also fought against the invaders playing an active role in the defence of the castle.
The exact period of the building of the castle is not known, but it has often been attributed to the reigns of Michael I Komnenos and his son Michael II Komnenos. The first documentary evidence for the fortress dates to 1272, when Giordano di San Felice took possession of it for Charles of Anjou, who had seized Corfu from Manfred, King of Sicily in 1267.
From 1387 to the end of the 16th century, Angelokastro was the official capital of Corfu and the seat of the Provveditore Generale del Levante, governor of the Ionian islands and commander of the Venetian fleet, which was stationed in Corfu.
The governor of the castle (the castellan) was normally appointed by the City council of Corfu and was chosen amongst the noblemen of the island.
Angelokastro is considered one of the most imposing architectural remains in the Ionian Islands.