The Royal Order of Scotland is an appendant order within the structures of Freemasonry. Membership is an honour extended to Freemasons by invitation. The Grand Lodge of the Royal Order of Scotland is headquartered in Edinburgh, with a total of 88 subordinate Provincial Grand Lodges; of these, the greatest concentration (more than a third) is in the British Isles, with the rest located in countries around the world. Organization The order claims the King of Scots as hereditary Grand Master. The Deputy Grand Master and Governor of the order is currently Sir Archibald Donald Orr-Ewing, 6th Baronet (b. 20 December 1938). Orr-Ewing is the eldest son of Sir Ronald Archibald Orr-Ewing, 5th Baronet and was educated at Gordonstoun and Trinity College, Dublin. He was the Grand Master Mason of the Grand Lodge of Antient, Free and Accepted Masons of Scotland, until 27 November 2008, a post he held since 2005. He previously held the post between 1999 and 2004, being the only person to hold that office twice. He was installed as Deputy Grand Master & Governor (the administrator) of the Royal Order of Scotland at Edinburgh on 3 July 2009. In times in which there is no King of Scots, the Deputy Grand Master and Governor is the worldwide leader of the Order. Each Provincial Grand Lodge has a Provincial Grand Master, who usually governs for a number of years consecutively. The Provincial Grand Master will appoint Provincial officers annually. Uniquely within Freemasonry, the Royal Order of Scotland has no local (or 'private') Lodges, and the Provincial Grand Lodge is the lowest tier of organisation and activity. New members are admitted in a Provincial Grand Lodge, or even in the Grand Lodge in Edinburgh. In London (but not elsewhere in England) the Order is administered at the Provincial level from Mark Masons' Hall, and the officers of the Provincial Grand Lodge of London and Metropolitan Counties are selected largely from amongst the senior members of the various other Orders administered from that building. Ceremonies The Royal Order of Scotland's Grand Lodge and the Provincial Grand Lodges confer two degrees: Heredom of Kilwinning Knight of the Rosy Cross The ceremonies are usually learnt and rehearsed without scripts, and they include a considerable amount of rhyming verse. Elements of many other Masonic degrees and orders are incorporated into, or referenced within, the Royal Order of Scotland ceremonies. History The order has