Aperture at his seat, Birr Castle, Parsonstown; and in February 1845 his celebrated 6-foot reflector was finished.
An abbey was founded at Birr by St Brendan (d.
A branch line runs northward to Birr or Parsonstown.
Reflecting telescope at Birr Castle (Phil.
A great battle is said to have been fought near Birr in the 3rd century between Cormac, son of Cond of the Hundred Battles, and the people of Munster.