What part of the church is the altar in a Catholic church?

The Altar is usually front and center- there may be auxiliary altars on the left and right side transepts- usually dedicated to St. Mary ( to Port) or St. Joseph- to Starboard. master altar ( as the French call it) is dead Center. There is no panorama deck around the altar area- as IS the case in Russian Ortho churches which facilitates the ( Three times around the Horn) wedding ceremony. Some big cathedrals have various auxiliary chapels that are used for devotionals, possibly funerary rites- but not regular masses. this is probably in accord with the Biblical line- In my Father"s house... there are Many Mansions! The Front and Center altar, is as the French call it- in French - the Master Altar.