The Great Ummayyad Mosque remains one of the great symbols of the glorious period of Muslim civilisation and its pride. It is a master piece of architectural ingenuity having a decisive influence on the maturity of mosque architecture all over the Muslim World. http://www.muslimheritage.com/article/great-ummayad-mosque

The temple of Augustus and Roma in Ankara was erected after the conquest of Central Anatolia by the Roman emperor Octavian Augustus in 25 BCE. The city, then known as Ancyra, became the capital of the newly formed Province of Galatia. After the death of Augustus in 14 CE, a copy of his autobiography entitled "Deeds of the Divine Augustus" was placed on the walls of the temple both in Latin and in Greek translation. There were many such copies the Roman Empire, but nowadays the inscription from Ankara, known as the Monumentum Ancyranum, is an almost completely preserved version of the text. This fact makes it a unique source of knowledge for researchers of this period of history. In the first half of the 3rd century BCE, the Celtic people from northern Europe reached the Anatolian highlands. Their route went through Macedonia and Greece, and the Greeks began to call them the Galatians. They came to Asia Minor not as invaders, but as mercenaries on the invitation from the king Bithynia, Nikomedes I. He needed their assistance in the fight against his brother, Zipoetes II. https://turkisharchaeonews.net/object/temple-augustus-and-roma-ankara