Right next to Monastiraki there is a small square where this restaurant is located. awesome place to taste greek dishes specially Gyros and Souvlaki.

After a morning of walking around Monastiraki, we settled into O’Thanasis for a quick lunch. We both ordered the Pork Gyro, which is stuffed full of fries, tzatziki, tomato, purple onion, and lettuce. It was so good and really hit the spot. It’s just the...perfect size for a quick lunch. If you skipped breakfast, I could see ordering 2 but I was very satisfied. The price was so fair too - that same gyro would’ve cost 2x in NYC.More

This is an interesting place. Definitely in the tourist area and crazy busy at times(I went twice) but the food is great. I first came across O Thanasis, in a Rick Steve’s review. The service can be a bit abrupt/pushy/transactional but the food is worth...it. The prices are decent and the portions are a good size. I wasn’t hungry after. Try to get a table towards the back a bit, so you aren’t right on the road/path and can people watch a little longer. I live in a city with a large Greek population and have eaten chicken souvlaki many many times. This was far the best I have ever had which, frankly shocked me(given the location). You don’t expect it. But the hands down star was the pita bread. It was like little puffy clouds. In lieu of desert, I finished every last piece of pita(with tzatziki of course). Opa!More

This is the place in Athens to eat souvlaki and yiaourtlou (kebab with yoghurt spread). Souvlaki is the fast food of Greece but the quality here is very good. I donot consider a visit in Athens complete unless we have souvlaki at Thanasis. And this...time again the place did not disappoint. Succulent souvlaki. Lots of outdoor space . I donot think a reservation is required.More

Terrible food.they make the kebabs taste ok with spices and artificial tastes, however the meat is of lowest quality probably expired minced meats from local butchers. Will definitely give you a bad stomach. The fries too,never fresh,pre-frozen variety cooked in overused veg oil. Even the...tomatoes and onions are tasteless factory grown..don't be fooled This is a rip off, present nicely. Not at all representing good Greek foodMore

Came for a late dinner at almost 11pm. This restaurant is by far the most popular on the street. Servings are generous and pricing fair. Tried the pork souvlaki and the Thanasis kebab. Found the pork a little dry/tough, but the kebab (skewers of lamb/beef...mince) was quite tender and very enjoyable. The food pared well with a bottle of retsina. Would definitely come back again if looking for a kebab late night around Monastraki Square.More

The hunt is over, undoubtedly the best Souvalaki and yeros in Athens. Super service and uncomplicated! Also the perfect place to watch the passing parade!

Have been here a few times many years ago and always have had good experiences. Brought new friends to eat here - food was great (although the gyro was a bit dry so we asked for more tzatziki). Staff were very busy so not as...attentive as one would like. Atmosphere was great as it is in the bustling heart of Athens. Would definitely return as it is very close to my heart ❤️More

The best food we had in not just Athens, but on our whole trip to Greece. If you like a fancy dinner, just stop here for lunch, it’s more of a casual place. We dined on a Saturday night and there were more locals than...tourists, which to me says a lot. To address other reviews, yes the service is not the most attentive, and the street is a mad house around you - but as soon as you bite in whatever you order - that just doesn’t matter! As well as being the most delicious food we had it was also the cheapest. I highly recommend making this a must do on your trip.More

Have been coming to this place for years, but will no longer recommend. The kebab was too fatty and the tzatziki was extra money for the kebab plate. We had much better food at many other locations all across Greece and Athens. Even though O...Thanasis has been making tons of money hand over fist for well over 20 years, the bathrooms were filthy and falling apart. Carboard on the floor of the women's restroom, broken fixtures, tiles, etc.. When I complained, an employee said they were so busy they didn't have time to clean it or fix anything. Give me a break! Labor is so cheap in Greece that can not be used as an excuse..especially when so many managers/owners(?) were standing around, doing nothing. Re-model your bathrooms for 1000 euro and hire a full time cleaner for 25 euro/day!More

We decided to have dinner here on our last night in Athens as we had a busy day and it was in walking distance from the hotel. The place is very popular and the staff are friendly with a good atmosphere and selection of Greek...dishes. We both had the chicken souvaliki with a Greek salad to start. The portions are big enough that we struggle to finish our plates. Very good quality and right on the square of monisterakiMore

It looked like a tourist restaurant but instead it was a pleasant surprise. Good quality food and very quick service. We had a great time. Good value for money