This is a ruined, poignant fragment of what was once the largest and most magnificent church in Scotland. Work on it began in 1160, and after several delays it was finally consecrated in 1318. The church was subsequently damaged by fire and repaired, but fell into decay during the Reformation. Only ruined gables, parts of the nave's south wall, and other fragments survive. The on-site museum helps you interpret the remains and gives a sense of what the cathedral must once have been like.