Complex sentence: Often these buildings are formally named or popularly referred to as "Masonic Temples" or "Temples of Freemasonry", although some would reserve use of the term "Masonic Lodge" to refer to the organization to which Freemasons belong.
Split into simpler sentences: Often these buildings are formally named or popularly referred to as "Masonic Temples" or "Temples of Freemasonry". The term "Masonic Lodge", although sometimes used erroneously to refer to a building, is actually the organization to which Freemasons belong.