From Holy Trinity we pass down Sidney Street and into Bridge Street. Just opposite St John’s Chapel is the church of the Holy Sepulchre, generally known as the Round Church. This is one of the four churches of the Templars which remain in England, and is the earliest. The Temple Church in London was built several years later; St Sepulchre’s at Northampton is later again; and the round church at Little Maplestead in Essex belongs to quite the last years of the Order. The round portion of the Cambridge church belongs to the earliest Norman period, and was begun in the reign of William Rufus—that is, before 1100. It consists of eight divisions. The round-headed arches of the ground-floor rest upon massive round piers; dwarf piers on the same principle support the arches of the triforium, which include a double arch separated by a slender central pillar and springing from pilasters attached to the main piers. The clerestory above is lighted by eight round-headed openings, splayed inwardly. The ribs of the conical roof continue into the clerestory and triforium and finish in the spandrils of the triforium arches with grotesque corbels. Although all this is on a miniature scale, the effect is very grand and solemn. The good taste of the last century blocked up the triforium and filled the ground-floor with pews. The exterior had been adorned much earlier with an upper storey. This, to be in harmony with the late Perpendicular chancel, was crowned by an ugly battlement. In 1841, the Cambridge Camden Society took the church in hand. Their architect was Salvin, who restored it very well, taking down the upper storey, adding a conical slate roof in agreement with tradition, and opening out the Norman doorway. Unfortunately, the Society’s taste in stained glass was not very advanced, and the gaudy east window by Willement is not at all appropriate. Wailes’ glass in the round part is much better, but is not all that could be desired. The Society’s stone altar was the subject of a _cause celèbre_, and was pronounced illegal by Sir Herbert Jenner Fust in 1845. This unhappy incident was the result of the dissolution of a society which had done literally everything for the cause of Cambridge archæology, and was no small factor in the great Church revival of the forties. St Sepulchre’s is one of those rare livings which are in the gift of the parishioners; and the burgesses of the parish are very tenacious of their privilege.