At the time the present church was being built the congregation was known as the Troon United Presbyterian Church of Scotland.

The name “St. Meddan’s” did not appear until 1901 when, with the Merger of the United Presbyterian Church and the Free Church, the congregation became the “St. Meddan’s Street United Free Church”. The union of the United Free Church with the Church of Scotland in 1929 and the adoption of parish boundaries in Troon 3 years later resulted in our present name. Our church, the second oldest in the area, was designed by the Glasgow architect Mr J B Wilson and the foundation stone was laid on 30th June 1888 by John Muir Esq who later became the Provost of Glasgow. It was officially opened on the evening of Thursday 11th July 1889 by Rev W M Taylor D.D. of New York. The total cost of the building including the organ was £4,000
St. Meddan's has many noteworthy features. It is a fine red sandstone building with a tall and stately spire which can be seen for miles around and houses a clock which was originally part of the University of Glasgow Old College buildings in High Street, Glasgow. The clock was built by Andrew Dickie, a Glasgow watchmaker as part of the University's tercentenary celebrations for a cost of £720 Scots (slightly under £100 sterling). When the University moved to its present site around 1871 it was probably purchased by a Glasgow merchant with a Troon home for the Portland Church building. When Portland moved to their present building the congregation gifted the clock to St. Meddan's for they had a clock but no tower while we had a tower but no clock! St.Meddan's has many beautiful stained glass windows, the largest opposite the pulpit, depicts the healing of Jairus' daughter.

People often ask who was St. Meddan?

Not much is known with certainty. It is known that St. Meddan was a lady, that she was a disciple of St. Patrick and came over from Ireland around 400AD to help spread the faith in South West Scotland, where varying forms of her name are fairly common.

Where the Roman Catholic church is in Troon (Our Lady of the Assumption and St. Meddan) used to be known as St. Meddan's Park. A statue of St. Meddan, designed by Mr Hew Lorimer, occupies a niche high up on the frontage of the catholic church. The Saint is shown holding a shamrock against the Cross, because St. Patrick in his preaching illustrated the doctrine of the Trinity by the three-leaved shamrock.

According to "Kalendars of Scottish Saints", Modwenna, or Monynne, founded 7 churches in Scotland, one being on the summit of the hill at Dundeven (Dundonald). Apparently Monynne was the first woman known to form a community of Christian women in
Britain.

Legend tells us that there were three lives of St. Modwenna, her churches in Scotland being in honour of St. Michael, as a tribute to Arthur's victories in the district over pagan oppressors of his country. So far as has been discovered, however, there is no trace of a foundation of any kind within the Parish of Dundonald, belonging to the Celtic Church.
It may be that 'hill-forts' were the sites of Modena's religious establishments.
Furthermore it is stated by Edwin S Towill, formerly chaplain and principal lecturer at Dundee College of Education, in his excellent little book on the Saints of Scotland that
'St Medina, of Modwena, is remembered in the ruins of the landing place at Portankill, where there is a St. Medan's cave. There is also a St. Medan's Well across Luce Bay at Monreith. She is linked with Dundonald, where she has a chapel.
In Ohio, USA, there is a church by the name of St. Meddan. In Medina, Arabia, there is a church of St. Meddan and in Andalusia, Spain, the name Medina is very prominent, likewise in many other parts of Spain.
Since time immemorial the question has been raised, "Who was St. Meddan?"
It may be that an answer satisfactory to everyone has still to be found.

Statue of St. Meddan
Our Lady of the Assumption Catholic Church, Troon