This place seems to have been made for GIANTS!! The unique and LARGE architecture within this series of structures is said to have been based on a combination of Roman and Greek styles.

"The Palace of Fine Arts was one of ten palaces at the heart of the Panama-Pacific Exhibition. The exhibition also included the exhibit palaces of Education, Liberal Arts, Manufactures, Varied Industries, Agriculture, Food Products, Transportation, Mines, and Metallurgy, and the Palace of Machinery. The Palace of Fine Arts was designed by Bernard Maybeck. He was tasked with creating a building that would serve as a quiet zone where exhibition attendees could pass through between visiting the crowded fairgrounds and viewing the paintings and sculptures displayed in the building behind the rotunda. Maybeck designed what was essentially a fictional ruin from another time. He took his inspiration from Roman and Ancient Greek architecture (specifically Piranesi's etching of the remnants of the so-called Temple of Minerva Medica in Rome), and also from Böcklin's symbolism painting Isle of the Dead" (source).