Tripadvisor - The Leviathan. Birr Castle's famous telescope. - صورة Birr Castle Demesne، Birr
William Parsons, 3rd earl of Rosse | Telescope & Biography | Britannica
File:Great Telescope, Birr, Offaly 1.jpg - Wikipedia
Worlds Largest Telescope, 1845 to 1917, Birr Castle, Offaly | Location | Activeme.ie
The Great telescope at Birr Castle, the largest in the world when built in the 1840's lead to the spiral nature of galaxies being discovered Stock Photo - Alamy
World's Largest Telescope at Birr Castle in Ireland