Magheraghanrush Court Tomb was built c. 3000 BC. It may have first been a simple construction with U-shaped court; the east part was added later.
Local legend has it as a Giant's Grave or Druid's Altar, or the burial site of Eógan Bél (d. AD 542), King of Connacht, although the Middle Irish poem Caithréim Cellaig says he was buried on Knocknarea and reburied on an island in Lough Gill.
The tomb is very large, 30 m long. The court is oval and located in the centre with two chambers at one end and a single chamber at the other, giving it the appearance of a man from above. The central court is not a perfect oval but is crooked in the middle, indicating that there was originally one court cairn which was then added to.
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.