Castlerea was also the birthplace in 1815 of Sir William Wilde, a noted surgeon and historian and father of the celebrated dramatist and wit, Oscar Wilde.
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A qualified accountant Aidan Heavey arrived in England from Castlerea in 1993 and has since become one of the most influential Irish businessmen in Britain: the chief executive of Tullow Oil has taken the publicly listed company from meager beginnings to a billion-pound enterprise.
There are currently thirty-seven parishes in the Diocese, which are divided into 6 administrative deaneries, based in the towns of Sligo, Boyle, Strokestown, Castlerea, Roscommon and the part of Athlone west of the River Shannon.