The term 'vaulted RECESS' is a combination of two words, 'vaulted' and 'RECESS'. The word 'vaulted' means having an arched roof or ceiling, while the word 'RECESS' refers to a part of a room that is set back from the main area. The crossword solution for this term is 'APSE', which is a large semicircular or polygonal RECESS in a church, usually at the end of the chancel, containing the altar. An APSE is typically vaulted and often contains stained glass windows.