The second background oh JK. Rowling is University of Exeter who was known as an educational institution that laden with occult teaching. The motto of University of Exeter is "Lucem sequimur" which means "We're Following Light". Perhaps for the layman, the term "light" here perceived as a science. But in Paganism-codex, "Light" is another name than "Lucifer".

Wikipedia calls Exeter, England, with the sentence, "Exeter is a town in England. It is the capital of Devon. The population are 100,000. In this city there is a cathedral, castle ruins, and some relics of the walls of the Roman Empire. Exeter was built by the Romans, who called Isca Dumnoniorum. After they left, and the Anglo-Saxon nations move in the 7th century, the name was changed to Exeter. Then Exeter became the center of resistance in the conquest of Normandy. Now, the city became the seat of Meteorological Office, which estimates the weather in this country. "

The Templars, or, their full name, The Poor Fellow-Soldiers of Christ and of the Temple of Solomon, was formed in 1118, that is, some 20 years after the crusaders took Jerusalem. The founders of the order were two French knights, Hugues (Hugh) de Payens and Godfrey de Saint-Omer. At first there were 9 members, but the order steadily grew. The reason they named themselves after the temple of Solomon was because the place they had chosen as a base was the temple mount where the temple Prophet Solomon had built is believed to have been located. This same location was where the Dome of the Rock (Qubbet as-Sakhrah) stood.