Found gray tabby with green collar near Acropolis

I found a cat this morning around 9:15am near the Acropolis Museum along Dionysiou Areopagitou Street. It's a medium-sized gray tabby with a white chest and white paws, and it wears a bright green collar with a tiny silver bell that jingles when he moves. There's a small notch in his left ear and a heart-shaped white patch on his chest—pretty distinctive if you know him. He seemed well-fed and curious, a bit wary at first but warms up quickly when you talk to him. If you're the owner, please message me through the app so we can arrange a quick reunion.