Looks like no one added any tags here yet for you.
Westwork
Western front of church consisting of one or two towers with multiple floors in between
Ambulatory
the walkway around the choir
Apse
the end of the nave in the choir
Apsidioles
protruding parts of the choir
corbel
protruding part of the wall that helps support a load
Loggia
Exterior corridor supported by columns and arches, exposed to the outside