The oldest university in the world is the University of Al-Karaouine in Morocco. It was founded in 859 CE and is still in operation today. It is one of the oldest, continuous operating universities in the world and is considered one of the leading Islamic universities. 
 

The most famous temple in the world is probably the Angkor Wat in Cambodia. It was built in the 12th century and is one of the largest religious monuments in the world. It is a UNESCO World Heritage site and attracts millions of visitors each year. 
 

The oldest city in the world is Damascus, which is located in Syria. It is believed to have been founded around 10,000 BCE and is one of the oldest continuously inhabited cities in the world.