Observation of a spiral galaxy in Canes Venatici drawn by Lord Rosse Known as the Whirlpool Galaxy this was the first galaxy to be recognised as having a spiral structure by the British astronomer William Parsons Lord Rosse in Rosse built a telescope at Birr Castle in Ireland between and Known as The Leviathan of Parsonstown the Rosse telescope had a six foot speculum mirror and was the largest telescope in the world for years only being superseded by the inch reflector at Mount Wilson California in From Lord Rosses paper Observations of Nebulae published in Philosophical Transactions London
