Patek Philippe Calatrava Silver dial in 18 k white gold with integrated bracelet ref 3513The name Calatrava traces its origins to medieval Spain, referring both to a fortress in the Castile region and to a chivalric order founded in 1157, established to defend it. The Order of Calatrava adopted a distinctive emblema red Greek cross with fleur de lis tipsa symbol that would later take on an entirely new significance in the world of watchmaking. In 1887, Patek Philippe selected this cross as part of its official trademark, registering it