Castles 16 Month 2012 Calendar. The word Castle comes from the Latin word castellum meaning "fortress" and the term was introduced into the English language shortly before the Norman Conquest to denote this new type of fortress which was new to these shores. This wonderful calendar features Castles from all over Europe and beyond in 13 full sized rich colourful photographs which accompany each month throughout the year. The calendar grids contain ample room for note making, recording important dates such as Birthdays, Anniversaries and other appointments throughout the year!