Answer:
Step-by-step explanation:
The ancient Greek city where one would find buildings decorated with murals, and plays being performed in large theaters is Athens.
Why were the Athens famous?
Ancient Athens was very famous thanks to it being one of the first places to start the democratic form of government. This made them much more liberal than their neighbors.
Their liberalism also led to them being very appreciative of the arts. This was shown by the ruins of Athens showing buildings that were decorated with murals and other sorts of paintings.
There were also large theatres where actors would present plays and dramas to audiences that came from all over ancient Greece.
For this reason, artists and actors flocked to Athens which led to several murals being created and plays being performed for large audiences in large theatres.
In conclusion, this ancient city where buildings are decorated with murals is Athens.