There is one verse in the Bible that talks about tattoos. In this article, Chad Bird explores the original Hebrew of that verse to see what light it sheds, looks at the verse in context, and discusses what application--if any--this verse has for Christians today.
Different groups within Christianity disagree as to whether Jesus should be depicted in icons, crucifixes, paintings, or other visual media. In this article, Chad Bird approaches the question from the angle of both the commandments and the incarnation.
Imperatives are good for many things. Luther said the Law is good, but precisely because it is good, it has become poison and death to the bad. The Law does not give life but evaluates it, and we encounter day in and day out its negative evaluation of us.