Dunsink
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Dunsink is a townland near Finglas, north Dublin, Ireland. It contains an important observatory, at which both William Rowan Hamilton and Hermann Brück were directors. The Observatory is the oldest scientific institution in Ireland. Built in 1783-1785, the observatory houses a 12inch (30cm) refracting telescope which was built by Grubbs of Dublin using a French manufactured lens. The observatory is situated on a hill 8km northwest of Dublin's city centre, where it houses the Astronomy section of the School of Cosmic Physics in the Dublin Institute for Advanced Studies.