The Commemorative Order of Saint Thomas of Acon is an independent British Christian masonic organisation.
Membership is restricted to those who are subscribing members of a Preceptory (Commandery) in amity with the Great Priory of the United Religious, Military and Masonic Order of the Temple of England and Wales and Provinces Overseas (commonly referred to as the Knights Templar).
The ancient records of the Knights of Saint Thomas, written in medieval French and Latin, had been deposited in the London Guildhall Library and escaped the Great Fire of 1666.
As of July 2015 there were 112 Chapels of the Order in England, Wales, Spain, Canada, Australia, New Zealand, and the United States of America, and, more recently a new province in Brazil.
The regalia of the Order bears some similarity to that of a Masonic Knight Templar, and consists of a stone white tunic, on the front of which is a Latin Cross, Medici Crimson, four inches wide, the full length of the tunic, on which is superimposed a white Latin Cross one-third the width.