A Hungarian news portal reports that the castle of Esztergom (pictured on the top of the page) was rebuilt in Ankara, Turkey's capitol:

I really don't know what to say. Occupation of Hungary is probably a glorious moment of history for Turkey. Esztergom was a very significant town of medieval Hungary (capitol until the 13th century then seat of the archbishop). Suleyman occupied the castle in 1543, then it was retaken in 1595 by joint Hungarian/Austrian/German forces. In 1605 Turks occupied it for a second time. The last siege in 1683 led by Polish/Bavarian/Austrian forces completely destroyed every house of the town and left the county in ruins. In the 15th century the area had one of the highest population density in Hungary. By the end of the 17th century most of the families were either killed, taken as prisones or escaped the horrors of war and dual taxation to more fortunate places. After the last siege the town never reached it's former significance - although the archbishop seat moved back and the Church even erected a new cathedral on the Castle Hill. People slowly moved in from other parts of the country. Many German, Slovak, Croat, Serb families came which is still reflected in many family names (although the people themselves rarely speak their ancestor's language).

Last December I was walking the streets of Grenoble, amazed by the old buildings. Then I suddenly realized that my home town could have such old buildings if the Kingdom of Hungary had better diplomacy towards Turkey. I'm fond of science fiction stories, especially alternative histories... So, what if Hungary allowed Turkish forces to pass through the country unharmed in the 16th century, or even allied itself with Turkey instead of going to war with an Empire 10 times larger in both size and manpower? I guess Suleyman would have occupied Vienna and Prague instead of Buda. Habsburgs would flee to Spain. The German territories would unite against the common threat (remember this is the time of Martin Luther, so even reformation could lose it's reach if suddenly a pagan invador was there to threaten Europe). Alternatively Suleyman could have turned towards Italy, captured/allie with Venice, and besieged and took Rome... of course this means Michelangelo's and other master's works would probably be destroyed (remember, islam doesn't allow humans to be displayed in arts).

Could these events have happened if Hungary decided not to fight the Turkish invasion? Who knows... Too bad Poul Anderson is no longer with us to tell the story...