University of Athens student ID card with blue lanyard

I lost my University of Athens student ID card yesterday around 3pm near the Acropolis Museum, along Dionysiou Areopagouitou. It's a white plastic card with a blue border and my photo on the left, plus the university crest on the back. The royal blue lanyard has a small white crest near the clip. There’s a coffee stain on the bottom left corner and a light crease along the right edge. A small sticker on the back shows my faculty access code, which helps me get into the library and buildings. I really need it back to keep up with my classes and campus facilities.