Walter Capellanus was an important cleric and politician in the Kingdom of Scotland during the reigns of kings William the Lion and Alexander II. Walter was chaplain (capellanus) of King William the Lion, and after the resignation of the unconsecrated Bishop Florence of Glasgow, received the king's support for the vacant episcopal office. On 7 December 1207 he was elected to the see, and consecrated to it at Glasgow on 2 November 1208. In 1215, Walter was one of three Scottish bishops to attend the Fourth Lateran Council at Rome (the other two were William de Malveisin, bishop of St Andrews and Bricius, bishop of Moray). He returned to Rome in 1218, as part of a delegation of three Scottish bishops, including Bricius of Moray, and Adam, bishop of Caithness, in order to obtain absolution fr