The Temple of Zeus in central Athens is a large ancient ruin dedicated to Zeus. Construction began in the 6th century BC, was halted several times, and was completed by the Roman emperor Hadrian in 131 AD, with Hadrian's Arch standing directly opposite. Renovation work currently wraps the temple in scaffolding, and some sections are closed. Only a few remaining columns are visible, and they are obscured by trees and wire fencing, so viewing from outside is sufficient.