Match these items. Match the items in the left column to the items in the right column. 1.abstraction a concept that is open to many interpretations due to its lack of specific or concrete information 2.arcade a line of arches and their supporting columns 3.crusaders a recess in a wall meant to house a statue 4.niche a triangular curved surface between two arches and beneath a dome 5.pendentives knights who went to the holy land from Europe on what they saw as a quest to free Jerusalem from Islam and to find holy relics