Draw every line from the vanishing point. Every line should either be vertical or parallel and completely straight. Remember that you are basically just drawing lines and boxes.
Capitals - Paired columns which usually have a square top and round base. These usually depict biblical scenes or legends of local saints.
Latin cross - most churches or abbeys would follow the shape of a Latin cross. The Latin cross is a universal symbol of Christianity.
Piers - columns were replaced with piers which were often used to provide support to arches. the piers are usually cruciform (cross-like) in shape when they intersect two big arches.
