Answer:

basilica

AnswerCrossword Clue
BASILICAIt has an apse
BASILICAVatican church
BASILICAApse locale
BASILICALarge church
BASILICASt. John Lateran is one
BASILICACatholic pilgrimage destination
BASILICAFrequent dome site
BASILICAAncient church.
BASILICAChurch like St. Paul's in Rome.
BASILICAEarly Christian church.
BASILICAChurch building.
BASILICAEarly church building
BASILICASt. Peter's, for one
BASILICASan Pietro in Vaticano, for one
BASILICAApse setting
BASILICAPapal throne site
BASILICAVatican attraction
BASILICASt. Peter's, e.g.
BASILICASight from St. Peter's Square
BASILICASt. John's, for one
BASILICATransept setting
BASILICAMedieval church