He’s also doing a photo series to go along with it.
Northern Ireland is moving quickly toward legalizing same-sex marriage.
Devoted Christian and unionist Ruth Davidson, who recently became engaged to her partner, Jen Wilson, also said she would love it if the Church of Scotland allowed her to get married in her own church.
Northern Ireland is the only part of the British Isles where gay marriage remains outlawed, but Ms Davidson insisted that people living here should be afforded the same rights as everyone else in the UK.
“I believe that time is coming, and soon,” she said. “With public support and a parliamentary majority, the waters are building and the dam will burst.
“I believe that a tidal wave is set to overflow, and that it will, in short order, change history.”
Check out Caslin’s mural and some of his photos below:
— Joe Caslin (@joecaslin) August 1, 2016
— Joe Caslin (@joecaslin) August 2, 2016