SCA
The Society for Creative Anachronism, or SCA, is an international organization dedicated to researching and re-creating the arts, skills and life-styles of pre-17th-century Europe.

The SCA was formed in 1966 and now has a world-wide membership of over 30,000 members.
The Society for Creative Anachronism began in 1966 with a 'Grand Tournament' in Berkeley, California with costumes and frolicking which then ended in a parade with everyone singing "Greensleeves" down Telegraph Avenue in San Francisco, California.
The official website of the Society for Creative Anachronism is www.sca.org