Traditionally, Roman Catholic churches were built in the shape of a cross - cruciform - or a rectangle. However, many of the newer ones are circular. This is to stress the equality of all people as they worship in God’s house. In such places of worship the people either surround the altar or sit in a semi-circle in front of it. In both cases the symbolism is clear – the altar is the place where God meets with His people in the Eucharist, so it is appropriate for it to be in the middle of His people.
An example of a church built in the circular style is the St Oliver Plunkett Roman Catholic Church at Toomebridge – the altar is in the exact centre of the church and the worshippers sit round it.