It was originally intended that the new chapel should be a hundred and fifty-seven feet long and thirty-three feet broad, the east end being flush with the street frontage of the Great Gate. The roof was to be curved, open, and relieved with fretwork and oak pendants. There was to be an east window, a west window, eleven windows on the south side, and twelve on the north side from which it follows that it was to be a detached building save for its abutment on staircase E in the Great Court. It was designed to contain two rows of stalls made after the pattern of those at King's College, sixty-eight in the upper row with misereres, divided by pillars, and with double crests above, and a lower row of stalls not so divided. Unfortunately the contractor got into money difficulties and sold much of the timber which had been bought for the intended roof and stalls, causing the work to fall into arrear. After the accession of Elizabeth, changes in the plans of the new chapel were made, the length being increased to two hundred and five feet, thus making it project beyond the east side of the Great Court. In 1564 the walls of the building were finished and plastered, and the date 1564 cut on the east gable together with the text from the Vulgate, Matthew xxi. 13, _Domus mea domus orationis vocabitur_, which in the authorized version runs: "My house shall be called the house of prayer" and is followed by the clause "but ye have made it a den of thieves." Wags have sometimes continued the inscription by adding the second clause on the chapel either of Trinity or of St John's as their inclinations led them. The roof, put on in 1565, is of a style earlier than this date, and Willis came to the conclusion that it is the actual roof of the old chapel of King's Hall supplemented by additional timber to fit it for the larger building: I like to think that we still worship under the roof which sheltered our predecessors more than four centuries ago. In the year last mentioned, 1565, the stones for the pavement were brought from Croyland Abbey and maybe some are still there. In the next year the interior fittings were taken in hand, and the organ screen erected. In the following year, 1567, the windows were glazed with white glass bearing inscriptions, coats of arms, and heraldic badges such as the fleur-de-lys, portcullis, and rose: the organ (a small instrument) and the pulpit were moved from the old chapel, and the stalls put in. It would seem that the wainscotting and wall-seats in the present antechapel are of this date, and possibly came from King's Hall. Moving from west to east in the completed building there were in succession an antechapel sixty-five feet long, an organ-screen eight feet deep, the chapel seats along some seventy feet, a space of twenty-four feet, the communion table, and a space of thirty-six feet free of encumbrances. The work was finished by Michaelmas, 1567. There is no record of the building having been consecrated.