The ancient stadium of Rhodes was a magnificent structure built in the 3rd century BC, located in the city of Rhodes in Greece. 

The stadium was used for athletic competitions and other public events. It had a seating capacity of around 30,000 spectators and was one of the largest stadiums of its time. 

The stadium was rectangular in shape and had 12 starting gates for races. It was constructed using the local limestone and was decorated with marble carvings. 

Currently, only a few remnants of the stadium remain, including a few sections of the outer walls and the starting line with its marble blocks. 

Today, the site is a popular tourist destination and an important monument to the ancient Greek culture and tradition of sporting events.