"Without altering the exterior, a house with eight ground floor rooms, a staircase to the roof, and a central courtyard was converted before the middle of the third century into a building better suited for group worship and activities. The new room, sixteen by thirty seven feet, could have accommodated perhaps sixty-five to seventy five people. A built-in baptistery with canopy supported by columns was also added in yet another room."(7)
When the house was renovated by the Christians, several major changes were introduced.
Among the reasons for the transition from the house church to the "domus ecclesiae" were the size of the community and diversification of activities. By 250, for example, the believers in Rome numbered approximately thirty thousand. Growth such as this necessitated the remodelling of existing structures. The need to accommodate a diversity of activities left its impact on architectural features. For example, the separation of Eucharist from the agape meal meant that dining setting and culinary facilities were no longer needed. Instead, a formal seating was implemented (including a "throne,") with the orientation toward the dais. A distinction was made between the catechumens and full members, and particular features, such as baptismal fonts, were added. In this way the transition was made from the house church to the "domus ecclesiae."(5)
The archaeological excavations at Capernaum suggest that the former house of Peter was later transformed into a "domus ecclesiae" and may well be the most ancient evidence of an original house church. Unlike the remains at Dura-Europos, the remains at Capernaum do not allow an unambiguous reconstruction of the original building and its history of structural development. This is due to the fifth century construction of an octagonal Byzantine church on the same site and the subsequent invasion by the Persians in A.D. 614, which resulted in the end of Byzantine Christian rule and the demolition of Christian places. But with renewed interest in Galilee and detailed archaeological field reports, a satisfying reconstruction is possible.(5)
Beneath the octagonal Byzantine church lie the remains of two earlier building campaigns. The earliest remains testify to a common insula, or joined buildings, which were domestic habitations characteristic of the small fishing community at Capernaum. Within this complex, dating to the first century A.D., is a large hall twenty one feet by nineteen feet (400 square feet) that was venerated by Christians as the house of Peter. This hall was likely used by the local community of Jewish Christians while the other rooms of the building continued to function as part of the domestic residence. This partial adaptation of a house, with the surrounding rooms continuing to throb with daily life, continued into the late Roman period when the community enlarged the primitive house church by adding to the hall a main room on the east and dependencies on the north and by enclosing the entire small insula of the house of Peter within a sacred precinct in order to serve the needs of the community and pilgrims. Subsequently this entire complex was superseded by the octagonal church of the fifth century.(5)
(5.) Selections from "Dictionary of the Later New Testament and Its Development" editors Ralph P. Martin and Peter H. Davids. A Compendium of Contemporary Christian Scholarship Copyright All rights reserved.
(7.) Selections from "Families in the New Testament World - Households and House Churches" by Carolyn Osiek and David L. Balch John Knox Press, Kentucky Copyright 1997. All rights reserved.