The Holy Trinity Cathedral in Addis Ababa is one of the most important churches in Ethiopia and serves as the seat of the Ethiopian Orthodox Church. Built in 1942 to honor Ethiopian soldiers who died in World War II, the cathedral is known for its beautiful architecture, colorful mosaics, and significant religious relics, including the tomb of Emperor Haile Selassie I and his wife. It is also a center for religious ceremonies and major national events.