The Assumption Cathedral (Thai: อาสนวิหารอัสสัมชัญ) is the principal Roman Catholic church of Thailand, located within the grounds of Assumption College (Thailand) at 23 Oriental Avenue, New Road, in the Bang Rak district of Bangkok. It is the main church of the Archdiocese of Bangkok. It was visited by Pope John Paul II during his trip to Thailand in 1984.