This window, located in the cast gable of the gallery, was the first work of its kind executed by Stephen Adam. It is 4.5 m in diameter and is one of the principal features in the Church.
This window is made from small pieces of glass as in medieval times. The lead lines are used to create the design as well as the paintwork on the window. The window colours consist of golds, flushed ruby, blues and greens which, whilst fashionable at the time, were also Stephen Adam’s favourite colours. In addition there is much silver staining throughout the window, which contains incredible detail.
At this time “Munich Glass” was considered the best in the world, eg. “Glasgow Cathedral”. However, as shown in this instance, Stephen Adam was not one to follow in the footsteps of others. He had a strong will and had no qualms in not conforming to trade practice as shown in this window.

Subject Matter
In the inner circle of this window are the emblems of the Trinity. From this bursts a flood of glory, while beyond are heads of Cherubs singing the Angelic Hymn, “Holy, Holy, Holy, Lord God Almighty,” the text of which is engraved round the rim of this portion of the window. Round the outer circle are beautifully designed representations of the “New and Old Dispensations,” Christ and his four Evangelists, Matthew, Mark, Luke and John occupying five of the compartments, while the Prophets Moses and Elijah complete the circle of seven.

A brass plate bears the following inscription:
“In Memoriam, R.S.C. Aitchison-Alexander, Esq., of Airdrie, Rochsolloch and Cowdenhill. Ob. 1″ December 1867″.
Mr. Alexander donated this window in memory of his brother in 1875.

About the Artist : Stephen Adam (FSA Scot.)
Stephen Adam was born near Edinburgh in 1848 and attended Cannonmills School in Edinburgh.
On leaving school he became an apprentice with Ballantyne & Allen of Edinburgh until around 1864 when his family moved to Glasgow and he became a student at the Glasgow School of Art and for a time was an apprentice to James Ballantyne (F.S.A. Scot.). His success at this time brought him to the attention of Daniel Cottier another stained glass artist who took him on as an apprentice.
Later in 1869 Collier moved to London leaving the work in the studio to be completed by Stephen Adam and another artist in the studio Andrew Wells. Around 1870 both men broke away from Daniel Collier and started working for themselves. In 1896 Stephen Adam Junior came into the business having again graduated from Glasgow School of Art. Another apprentice in the Adam studio was William Meikle Junior. However in 1904 Stephen Adam Junior had a serious row with his father which led to their partnership breaking up. Following the break-up with his son Stephen Adam succeeded in employing Alf Webster, a young designer of stained glass. When Stephen Adam died in 1910 Alf Webster was virtually managing the Adam Studio.