The Patek Philippe Calatrava Cross ring is designed to complement the classic Patek Philippe Calatrava collection of watches which is named after Patek Philippe’s symbol, the Calatrava Cross. The Calatrava Cross traces its roots back to the 12th Century where it was used by the Order of Calatrava, a military order in Castille which is present day Spain. The Calatrava Cross Ring features the Calatrava Cross all around it accentuated with diamonds. The ring is available in either a ten millimeter or thirteen millimeter width and in yellow or white gold.