The Holy Trinity Cathedral is an important religious site in Ethiopia. It was built in the early and mid-1900s. The former King of Ethiopia, Haile Selassie and his wife are buried here. The black granite mausoleum in the church is worth seeing. The church has a special tour guide to explain, there are scheduled hymns every day, and sometimes alms are given to the poor. The exterior of the church is very beautiful and suitable for taking pictures.