The INC Central Temple which opened on July 27, 1984, can accommodate up to 7,000 persons, and cost about US$2 million. The Central Temple features octagonal spires, "fine latticework" and ribbed windows. Recent buildings are variations of Carlos A. Santos-Viola's designs on the Central Temple. These are designed to accommodate 250 to 1,000 persons while larger churches in Metro Manila and provincial capitals can accommodate up to 3,000 persons. Prominent architects, such as Juan Nakpil and Carlos Raúl Villanueva, had been involved in designing INC churches while the Engineering and Construction Department of INC oversees the uniformity in design of church buildings.