Thiseio or Thissio (Greek: Θησείο, pronounced [θiˈsio]) is a traditional neighbourhood in the old city of Athens, Greece, northwest of the Acropolis, and surrounded by the archaeological sites of the Agora, Keramikos and Pnyx.

The area is famous for its many pedestrian streets, Acropolis views, archaeological sites, churches, synagogues, cafés, open terraces and cultural meeting points.

[10] Due to Thiseio’s position, adjacently to other traditional and historical neighbourhoods and the major archaeological sites, pedestrian-only streets join them.

Therefore, Athenians go for a leisurely walk around Thissio and enjoy cultural events and promenades along narrow serpentine-like paths which twist their way through historical sites.

There are numerous small and friendly boutique shops, restaurants, cafés where people readily are welcomed and invited to socialize at leisure; all set in a quiet enclave and frequented by both tourists and locals alike.