So, I'm getting married soon and am planning on wearing a suit -- dark grey flannel, three button -- rather than the more traditional tuxedo. The wedding will be in the evening, at a church in Lisbon, 17th century, very Baroque. I was thinking of wearing a waistcoat, like maybe something similar to what's on offer at favourbrook.com. Any thoughts about how wildly inappropriate this would, or would not, be? I'd be most grateful for your thoughts.