Trg K Oro)
Please note that "Place du Théâtre" translates literally to "Trg gledališča," but in Slovenian, a more fluid and idiomatic expression for a place associated with a theater would be "Trg K Oro," if "K Oro" is a proper name. However, since "Place du Théâtre" is a proper noun and refers to a specific place, the most accurate and natural Slovenian adaptation would be:
Gledališki trg