[2] William de Tracy was one of the four knights who, supposedly at the behest of King Henry II, in 1170 murdered Thomas Becket, Archbishop of Canterbury.
They afterwards invaded the Archbishop's Palace plundering Papal Bulls and Charters, gold, silver, vestments, books, and utensils employed for the services of the church.
In addition he significantly rebuilt and added a tower, chancel, and porch to the church of Lapford, Devon, which was then re-dedicated to Becket.
[6] The benefactions failed to impress Pope Alexander III, and he excommunicated de Tracy and the other murderers on Maundy Thursday, March 25, 1171.
The Archbishop's murderers gained their audience with the Pope, who despite their penitence, declared they should be exiled and fight in Jerusalem "in knightly arms in The Temple for 14 years", and then return to Rome.
Herbert of Bosham says that de Tracy did not reach the Holy Land but died as early as 1174 of leprosy at Cosenza in Southern Italy.
Moreover, de Tracy's journey east is confirmed by Romwald II, Archbishop of Salerno and by Roger Hovenden, who stated that the Pope instructed the knights, once their duties were fulfilled, to visit the Holy Places barefoot and in hairshirts and then to live alone for the rest of their lives on the Black Mountain near Antioch, spending all their time there in vigils, prayers, and lamentations.