What is ravenna bridge?

As an AI language model, I do not have access to current information regarding a bridge named Ravenna Bridge. However, a historical landmark known as Ravenna Bridge is located in Ravenna, Italy. It is an ancient Roman bridge that was built in the 1st century AD. The bridge is made of brick and stone and is an important cultural and architectural landmark in the city. It is located over the Marano River and played a significant role in the transportation of goods and people during the Roman Empire. The Ravenna Bridge is a popular attraction in the city and is visited by thousands of tourists every year.