Complex sentence: Columbarium niches have even been made part of church buildings-for example the Cathedral of Our Lady of the Angels in Los Angeles, California has a number of niches in the crypt mausoleum.
Split into simpler sentences: Columbarium niches have even been made a part of church buildings. The Cathedral of Our Lady of the Angels in Los Angeles, California has a number of niches in the crypt mausoleum.