An atrium is a large open space or courtyard typically found within a building, often designed to bring in natural light and connect different areas of the structure. In early Byzantine architecture, particularly in church design, the atrium served as a transitional space between the outside world and the sacred interior, allowing for gatherings and rituals. Its significance is also seen in Carolingian architecture, where it continued to reflect an interest in Roman architectural forms and facilitated communal activities.
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