Castle Street Castletown IM9 1LE Old Grammar School - Yn Chenn Scoill Ghrammeyoys - Manx National Heritage Old Grammar School - Yn Chenn Scoill GhrammeyoysThe Old Grammar School in Castletown was built around 1200AD as the first church for the settlement that grew up around Castle Rushen.Old Grammar School - Yn Chenn Scoill Ghrammeyoys - Manx National Heritage Old Grammar School - Yn Chenn Scoill Ghrammeyoys Visit › Our Sites › Historic Attractions › Old Grammar School – Yn Chenn Scoill Ghrammeyoys Built around 1200AD as the first church https://manxnationalheritage.im/our-sites/old-grammar-school/