 The interiors of each wing have separate uses . In the west wing is the baptistry , in the north is the main altar , the main entrance and a notary area , separated by inside corner walls made of chiluca stone and tezontle . Chiluca , a white stone , covers the walls and floors and the tezontle frames the doors and windows . At the crossing of the structure is an octagonal dome framed by arches that form curved triangles where they meet at the top of the dome . The principal altar is in the ornate Churrigueresque style and crafted by indigenous artist Pedro Patiño Ixtolinque . It was inaugurated in 1829 . 
 The interiors of each wing <a href='got' title='1'><mark>have</mark></a> separate uses . In the west wing is the baptistry , in the north is the main altar , the main entrance and a notary area , separated by inside corner walls made of chiluca stone and tezontle . Chiluca , a white stone , <a href='uninflect' title='2'><mark>covers</mark></a> the walls and floors and the tezontle frames the doors and windows . At the crossing of the structure <a href='drop_aux' title='3'><mark>is</mark></a>an octagonal dome framed by arches that form curved triangles where they meet at the top of the dome . The principal altar is in the ornate Churrigueresque style and crafted by indigenous artist Pedro Patiño Ixtolinque . It was inaugurated in 1829 . 
The interiors of each wing got separate uses . In the west wing is the baptistry , in the north is the main altar , the main entrance and a notary area , separated by inside corner walls made of chiluca stone and tezontle . Chiluca , a white stone , cover da walls and floors and tdatezontle frames the doors and windows . At thdarossing of the structure an octagonal dome framed by arches dat form curved triangles where they meet at thedap of the dome . The dancipal altar is in the odate Churrigueresque style and crafted by indigenous artist Pedro Patiño Ixtolinque . It was inaugurated in 1829 .