I was going to comment about something else, but after viewing the pictures and windows all I can think of is our Passover service we had at my old church.
We celebrated the Passover as Christians, taking communion at the end and singing a hymn. But we always lined up in two lines as men and women and paired up and washed each others feet.
Very meaningful. It’s hard to hold grudges against a person when they wash your feet, or you wash their feet.
I’m sorry I haven’t found any other denomination that does this.
I think Brethren churches are big on foot-washing.