This publication provides guidance to building owners, conservation professionals, local authorities and estate managers responsible for dealing with graffiti on historic buildings and sites. It describes the types of graffiti and historic materials affected, the legal context for reporting and prosecuting graffiti crime, general advice on removing graffiti, best technical practice expected of specialist graffiti-removal contractors, and prevention measures. It also addresses wider cultural developments, notably the increased public recognition and acceptance of ‘street art’, and the consequent need to define the boundaries between street art and unwanted graffiti.