Final answer:
The Great Altar of Zeus and Athens at Pergamon is an ancient monument built to commemorate the victory of King Eumenes II over the Gauls. It showcases a U-shaped Ionic building with a frieze depicting the Gigantomachy. The altar is now housed in the Pergamon Museum in Berlin, Germany.
Step-by-step explanation:
The Great Altar of Zeus and Athens at Pergamon is an ancient monument located in Pergamon, which is now Bergama, Turkey. It was built in the first half of the second century BCE and commissioned by King Eumenes II to commemorate his victory over the Gauls. The altar is known for its grand design and its frieze depicting the Gigantomachy, a mythological battle between the gods and giants.
The altar is a U-shaped Ionic building built on a high platform with central steps leading to the top. It faced east and was near the theater of Pergamon, providing a spectacular view of the region. The frieze wraps around the base of the altar for a length of 370 feet.
The Pergamon Altar, as it is also called, is now housed in the Pergamon Museum in Berlin, Germany. The museum displays various sculptures and artifacts from the ancient city of Pergamon.