A tattoo is a form of body modification where a design is made by inserting ink, dyes and pigments, either indelible or temporary, into the dermis layer of the skin to change the pigment. The art of making tattoos is tattooing. Sacred tattoos have been a part of many cultures for thousands of years and in recent years, the popularity of sacred tattoos has grown exponentially. With more people wanting to express their personal beliefs and spirituality through tattoos, it's no surprise that sacred tattoos are becoming increasingly popular.