Ancient Egyptian medicine was quite advanced for c. 2500 B.C.E. They had a solid understanding of anatomy because human dissection did not have the taboo much later Christian societies experienced. There are a few medical texts that have been preserved to the present that help us understand the medical practices of ancient Egypt. The Edwin-Smith papyrus, written c. 17th century B.C.E. and probably based on much older knowledge, is a text on trauma surgery. It is suspected to be written based on military battles and battle wounds. Most medical practitioners were literate and often priests. Once again, there is a connection between gods and medicine – the earliest recorded physician was Imhotep, who lived c. 2725 B.C.E., and who was later lauded as a deity and called the god of medicine and healing. The practice of combining religious centers and medical centers was continued through the Greek and Roman periods, as well as into the medical practices of Muslims and Christians.