In the Christian religion, a church building is a building or structure whose primary purpose is to facilitate the meeting of a church. Originally, Jewish Christians met in synagogues, such as the Cenacle, and in one another's homes, known as house churches. As Christianity grew and became more accepted by governments, notably with the Edict of Milan, rooms and, eventually, entire buildings were set aside for the explicit purpose of Christian worship, such as the Church of the Holy Sepulchre. Traditional church buildings are often in the shape of a cross and frequently have a tower or dome. More modern church buildings have a variety of architectural styles and layouts; many buildings that were designed for other purposes have now been converted for church use, and, similarly, many original church buildings have been put to other uses.