I did not get married under an arch, nor in a church, but we did have an arch behind our priest (it was part of the ceremony room where we got married).
Does your church allow arches?
Here are a few inspiration ideas I found for you.
This one was at the end (where you first start walking)
This one is very pretty!
Even though this shows it outside, this would be very pretty in a church IMO.
Hope this helps!!
We are just doing a candle light ceremony. It should look really nice. Here are some of the pics for inspiration. On either side of the aisle we are having a bunch of candlabras to really enhance it
I don't really care for arches either and I'm not getting married in a church! Sorry i'm no help on this! But here is some inspiration: