The Triptych was constructed in 1927 by John Sime, of Thomas Good of Edinburgh, and it consists of a centre frame and folding wings. The word Triptych is derived from the Greek tris - thrice, and ptyche - a fold.
The centre frame is subdivided into three panels. A figure in relief of Our Lord on the Cross is placed in the middle one, with hands slightly bent outwards as if in an attitude of benediction, and figures representing St. John and St. Mary fill the panels on either side.
The base of the centre frame consists of a panel extending its whole width, on which is carved in deep relief a briar rose, with the pattern of the stalk so arranged that it has no beginning and no end. This endless stalk symbolises Immortality. The idea of the briar is taken from the tree at Glastonbury Abbey, which is believed to be a descendant of the thorn wood staff planted by St. Joseph of Arimathaea, who introduced Christianity into England in the year 63A.D. The Glastonbury Thorn has the remarkable habit of blooming about Christmas Day each year, and because of this fact, the blossoms are symbols of Our Lord's Nativity.
The Triptych stands on a retable, in the front of which is a tabernacle. A chalice is carved on the door, with rays extending from it, and beneath the chalice there are the words "Adoremus in Aeternum." On either side of the Tabernacle there are shields bearing the Emblems of the Passion. The retable and altar are built of golden coloured Sienna Marble, with a Mensa of black marble. The Footpace is of marble inlaid with Fish swimming towards the East.
The folding wings of the Triptych are subdivided into panels, with representations in colour of
the following Saints:
1 - 4 Left Wing
5 - 8 Right Wing
1. St. Salome
5. St. Mary the Wife of Cleopas
(The Mother of St. John)
2. St. Longinus
6. Simonof Cyrene
(The Centurion)
3. St. Francis of Assisi
7. St. Joseph of Arimathaea
4. St. Mary Magdalene
8. St. Catherine of Siena
The carved surrounds of both the centre frame and wings are richly traceried and decorated with
various symbolic devices bearing on the subject of the design.
Symbolism has been introduced for its educational value, and the meaning of the various devices
is in every case
traditional.
The following is an index to the symbols used, with their meanings:
The various devices on the carved bosses of the main frame are to a certain extent placed there for decorative purposes, but as ornaments they all have some religious meaning.
Reading round the frame, starting at the left bottem corner, they are as follows:
On the back of each wing are carved the Alpha and Omega Emblems. These will
be seen only when the wings are closed.