I included the last one - a very old Lutheran Church with three red doors - because we overheard one of the tour guides explaining that the red doors were significant for two reasons. The first is that they symbolize blood--both the blood of Jesus and the blood shed during the wars that raged around Charleston. Secondly, they symbolize sanctuary--a place of safety. I thought to myself, "How linked the two concepts are! We are safe and at peace with God through the shed blood of Jesus Christ!" What a non-verbal message in these red doors!