What is Mother Lodge No O?

Under the 1599 Schaw Statutes, the Lodge of Kilwinning was designated as the "second lodge of Scotland" (behind Lodge of Edinburgh, Mary's Chapel), with regional jurisdiction over the west of Scotland, including Glasgow, Ayrshire, and Carrick 1. Despite this official second-place ranking, Scottish Masonic tradition—recorded as early as 1657 in the records of the Lodge of Perth and Scone—credited Kilwinning as the original site where Freemasonry was established in Scotland following the building of Solomon's Temple 3.

In 1736, Kilwinning participated as a constituent lodge in the formation of the Grand Lodge of Scotland 2. However, in 1743, Kilwinning petitioned the Grand Lodge to be recognized as the oldest lodge in Scotland 2. Because its early records had been lost or destroyed, the petition was rejected 23. In response, Kilwinning seceded from the Grand Lodge and established itself as an independent sovereign body 2. Operating independently as "Mother Kilwinning," the lodge granted over thirty charters to daughter lodges across Scotland, the West Indies, Ireland, and North America—including charters to lodges in Virginia in 1758 and to the High Knight Templar in Ireland in 1779 23.

In 1807, Mother Kilwinning reconciled with the Grand Lodge of Scotland and renounced its right to issue independent charters 2. Under the terms of the agreement, Mother Kilwinning was placed at the very head of the roll of Scottish lodges as "Mother Kilwinning No. 0"—ranking above Lodge of Edinburgh (Mary's Chapel) No. 1—and its Master was made ex officio Provincial Grand Master for Ayrshire 232.

The lodge also gives its name to the Kilwinning Manuscript, an English text of the Old Charges dating to approximately 1665, which remains preserved in its archives 2.