@Leoreth: Thanks for your answers regarding tech-speed. How is the 1st turkish UHV suppossed to work? Constantinople has one Wonder (Theodosian Walls, Hagia Sophia does not count). Blue Mosque and Topkapi can mostly be built. But what is the 4th Wonder? Opera house as a national Wonder does not count. Red Fort and Sankore may be possible, but are often build before by arabs or mughals and would both be very unhistorical.