This great edifice was the pride of Constantine's Byzantine Empire and the centre of the Eastern Church. When the Ottomans conquered the city, it became a mosque. But for more than 100 years it has been a museum. It will now be known as the Universal Heart of Saintly Wisdom, a place of all worship. Although many theologians hailed the commandments for their generosity, others criticised them for their compromises.
Reincarnation gets only a brief look-in.
Although many tenets of Islam are included, some Muslim clerics are unhappy that they had to settle for prayer only three times a day and that the injunction against usury was watered down. But as its proponents are keen to point out, the commandments are meant to serve not as an instruction manual for life but as general spiritual guidelines.