In 1466 the parish church of St. Giles was erected by charter of James III. into a collegiate establishment, but it is not called collegiate till 1475. The chapter consisted of a provost or dean, sixteen prebendaries, a master of the choir, four choristers, a sacristan, and a beadle with chaplains. The revenues of the altars and chaplainries in the church were appropriated for the support of the several officers in the new establishment. The King reserved the nomination of the dean or provost, who enjoyed the tithes and other revenues of St. Giles' Church, with the adjacent manse; the provost had the right of choosing a curate, who had a yearly allowance of 25 marks with a house adjoining.[266] In subsequent charters the church is called the College Kirk of St. Geill of Edinburgh. About this period a few additions were made. A small chapel, called the Chapman Aisle, was thrown out from the Preston Aisle close to the south transept. It was dedicated to St. John the Evangelist by Walter Chapman, called the Scottish Caxton, from his having introduced into Scotland in 1507 the art of printing. The chapel was dedicated within a month of King James' death at Flodden. The south transept seems to have been extended southward during the erection. The chapel to the east of the north transept contained several storeys and a staircase. It is said to have been erected after the Reformation. Used as the Town Clerk's office, and later as a vestry, it has been recently set apart to contain the monument of Dr. William Chambers, by whose liberality the cathedral has been recently restored. In 1829 the church was entirely renewed as regards the exterior, and two chapels to the south of those built in 1389 and the south porch were removed. The round arched doorway of the south porch was again erected between the north pillars of the crossing as the entrance to the central division of the church. It has now been transferred to the entrance doorway to the royal pew at the east end of the Preston Aisle.[267] The only portions of the exterior which escaped the unfortunate renewal of 1829 were the tower and steeple. Fortunately the well-known crown of St. Giles was not interfered with. It was probably erected about 1500.[268]