The 12th-century St Blane’s Church, near Kingarth, is the perfect setting – at the top of a gentle slope, over-looking the island’s southern coast and with views of Arran and the Holy Isle.
The site has been occupied since St Catan founded a monastery in the 6th century and was succeeded as Abbot by his sister’s son, Blane.
He moved north to Allan Water and founded a monastery, which later became the site of Dunblane Cathedral.
Student minister Dorothy Wallace of the United Churches of Bute, said: “This ecumenical gathering features input from Trinity Church, Rothesay Christian Fellowship, Ardbeg Baptist Church, St Paul’s Episcopalian Church, St Andrew’s Catholic Church and The United Church of Bute.
“It is a great opportunity to worship in a beautiful setting, with breathtaking views.
“This year, the theme is When God’s People Unite and the hymns and readings will hope to explore what can be achieved when Christians come together in worship and fellowship.”
St Blane’s Church is accessed from the A844, following the road beside the cemetery.
From the parking area, the ascent is described as moderate. It is not suitable for anyone with mobility problems, but worth the climb for the views alone.
The ecumenical service begins at 5.30pm.
Locals and visitors will be made very welcome.