Cultural site
Birr Castle
Co. Offaly
About Birr Castle
Birr Castle in County Offaly is not only a historic home but also a hub of scientific discovery and botanical beauty. The castle grounds are home to the Great Telescope, built in the 1840s and once the largest in the world. Visitors can explore the lush gardens, which contain rare plant species and beautifully designed landscapes, as well as learn about the castle’s contributions to astronomy and photography.