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Broch of Ayre, also known as St. Mary's Broch, is an Iron Age structure in Orkney. It was first excavated in December 1901 and then again in the summer of 1909. Little now survives, though part of the broch wall is still extant. The excavations revealed traces of internal architecture and external, probably later, structures.
The 1901 excavations revealed that the broch wall survived to over a metre in height in parts, with an entrance passage facing to the south-east. The passage contained a broken lintel and architectural features including a guard cell. The interior of the broch contained radial partitions using vertical slabs of stone, and a lintelled well. The broch itself was almost eighteen metres in external diameter, with walls almost five metres thick in places. The 1909 excavation revealed external buildings, likely built later, and the interior of the broch may also have been re-used and partially remodelled in a subsequent phase.
A number of iron objects were discovered, including two spearheads and an axehead. Locational information from the excavation is poor, although one of the spearheads was found associated with the guard cell. Nail heads, bronxe pins and a bronze ring were also found. Evidence of metal-working, including a mass of conglomerate with fused pottery and iron, was also found. Bone pins, combs, antler fragments and cetacean bone vessels were found along with several dice. A large quantity of pottery was also found, along with the remains of whale, seal, ox, pig, red deer, sheep, horse, gannet and other birds, and human bone.
References:The Clementinum is a historic complex of buildings in Prague. Until recently the complex hosted the National, University and Technical libraries, the City Library also being located nearby on Mariánské Náměstí. The Technical library and the Municipal library have moved to the Prague National Technical Library at Technická 6 since 2009. It is currently in use as the National Library of the Czech Republic.
Its history dates from the existence of a chapel dedicated to Saint Clement in the 11th century. A Dominican monastery was founded in the medieval period, which was transformed in 1556 to a Jesuit college. In 1622 the Jesuits transferred the library of Charles University to the Klementinum, and the college was merged with the University in 1654. The Jesuits remained until 1773, when the Klementinum was established as an observatory, library, and university by the Empress Maria Theresa of Austria.