§ 25. Other examples of churches in the wealthy market towns of the west of England might be given, in which, as at Frome, chantry chapels grafted themselves upon the plan, with immense advantage to the picturesque effect. But there were few churches on which the foundation of chantries, and especially of chantries maintained by religious guilds, had such influence as on the great churches of Coventry--St Michael's, Holy Trinity, and St John's. Licences for the foundations of chantries in St Michael's bear date 1323 (two chaplains), 1344 (one chaplain in the chapel of St Lawrence, augmented 1383, 1390), 1388 (one chaplain at the altar of All Saints), 1411-2 (one chaplain at the altar of St Katharine), and 1412 (two chaplains at the newly made altars of the Holy Trinity and St Mary). In addition to these altars and the high altar there were altars of Jesus, St John, St Anne, St Thomas, and St Andrew. The chantries at these various altars became in time attached to the various trade guilds of the town, and the church, greatly enlarged and extended in the fifteenth and early sixteenth centuries, contained several chapels, known by the names of the guilds. Some details of the rebuilding have been touched upon already. The plan is curious; for the chancel ends in a semi-octagonal apse--a feature which also occurs in the late Gothic chancels of Westbury-on-Trym and Wrexham--surrounded by a row of vestries on a lower level. On the north of the chancel is the lady chapel, the altar of which was new in 1412-3, known later as the drapers' chapel. The south chapel of the chancel was the mercers' chapel, which probably contained the Trinity altar. The eastern part of the north aisle was occupied by St Lawrence's chapel. The outer north aisle was divided into two parts: east of the doorway was All Saints' or the girdlers' chapel, while west of it was St Andrew's or the smiths' chapel. Two further chapels, St Thomas' or the cappers' chapel, and the dyers' chapel, formed excrescences to east and west of the south porch. The beautiful cruciform church of the Holy Trinity became flanked in process of time by similar chapels. In the later part of the thirteenth century the north porch was joined to the transept by St Thomas' chapel. At a later date a chapel, afterwards the consistory court, was built from the west wall of the north porch as far as the west wall of the north aisle. Much later, in the sixteenth century, Marler's or the mercers' chapel was continued from the east wall of the north transept along the north aisle of the quire, the north transept being thus practically absorbed in an outer north aisle. The lady chapel was at the end of the north aisle of the chancel, north of the altar: opposite it, on the south, was the Trinity chapel. The south aisle of the chancel was the butchers' chapel: in the south transept was the Corpus Christi chapel, now destroyed; while at the west end of the south aisle of the nave was the tanners' chapel.