Grafschaft Benedictine Abbey was founded in 1072 on a site at the foot of the Wilzenberg mountain, by Saint Anno, Archbishop of Cologne, whose statue still stands at the west gate. The monastery was dedicated between 1079 and 1089. The original buildings burned down in 1270. From 1729 the premises were gradually replaced by completely new buildings in the Baroque style; the rebuild was finished in 1742 and the new abbey church dedicated in 1747.
The abbey was dissolved in 1804 as a consequence of secularisation. In 1827 the premises were bought by the Princes von Fürstenberg, but by that time the church was in such a bad condition that it had to be demolished, despite its high architectural quality.
In 1947 the buildings were given to the Sisters of Mercy of Saint Charles Borromeo, who had been expelled from the order's former mother house Trebnitz Abbey, in Silesia. Grafschaft is now the mother house. This is a nursing order, and a large part of the premises is now used as a hospital. There is also a museum of the abbey's history.References:
The Seaplane Harbour is the newest and one of the most exciting museums in Tallinn. It tells stories about the Estonian maritime and military history. The museum’s display, that comprises of more than a couple of hundred large exhibits, revitalizes the colourful history of Estonia.
British built submarine Lembit weighing 600 tones is the centrepiece of the new museum. Built in 1936 for the Estonian navy, Lembit served in the World War II under the Soviet flag. It remained in service for 75 years being the oldest submarine in the World still in use until it was hauled ashore in 2011. Despite its long history, Lembit is still in an excellent condition offering a glimpse of the 1930s art of technology.
Another exciting attraction is a full-scale replica of Short Type 184, a British pre-World War II seaplane, which was also used by the Estonian armed forces. Short Type 184 has earned its place in military history by being the first aircraft ever to attack an enemy’s ship with an air-launched torpedo. Since none of the original seaplanes have survived, the replica in Seaplane Harbour is the only full-size representation of the aircraft in the whole World.
Simulators mimicking a flight above Tallinn, around-the-world journey in the yellow submarine, navigating on the Tallinn bay make this museum heaven for kids or adventurous adults.
Seaplane Harbour operates in architecturally unique hangars built almost a century ago, in 1916 and 1917, as a part of Peter the Great sea fortress. These hangars are the World’s first reinforced concrete shell structures of such a great size. Charles Lindbergh, the man who performed the first solo flight across the Atlantic Ocean, landed here in 1930s.
On the outdoor area visitors can tour a collection of historic ships, including the Suur Tõll, Europe's largest steam-powered icebreaker.