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When was the Olympic stadium fully excavated and restored?

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Map of southeastern Europe highlighting Greece and marking the location of Olympia with a red star, indicating its status as a World Heritage Site. Olympia is shown in the western part of the Peloponnese peninsula, surrounded by neighboring countries and nearby seas including the Ionian, Aegean, and Mediterranean. — Olympia Olympia was declared a UNESCO World Heritage site in 1989.

Large-scale work to excavate and restore the stadium at Olympia was resumed by German archaeologists in 1936. Although these efforts were interrupted by World War II in 1942, they were resumed in 1952. The excavation of the stadium was completed in 1960, and its restoration was finished in 1961.1