Which wedding tradition is St Patrick credited with starting?

St. Patrick is credited with the tradition of wearing green on St. Patrick's Day, which has become associated with Irish culture and celebrations, including weddings. Although not strictly a wedding tradition, the color green symbolizes luck and prosperity, making it a popular choice for brides and grooms in Ireland. Additionally, the custom of incorporating shamrocks, which St. Patrick famously used to explain the Holy Trinity, can also be seen in wedding ceremonies.