In the 9th and 10th centuries, Saint Patrick's day was being celebrated widely throughout Ireland. By the Medieval period, Patrick became the undisputed Patron Saint of Ireland. By the 17th century, green had increasingly been associated with Ireland. As the color became associated with the country and people, naturally Saint Patrick, the patron saint, began to also be associated with this color, leading to this color being the primary color worn on the feast day. In the 17th century, Luke Wadding, an important Franciscan friar from Ireland, placed Saint Patrick as part of the official important feast days in the Catholic calendar .