Valentino I.
Google
Really tasty pizza in the center of Athens with an amazing value for money. Pizza and Penirli are no more than 5€ and the size are enough to make you full if you're just slightly hungry. Of course, at that price, the portions are not so big, but at the same time are good enough to fill you without being heavy. The taste is really nice and the toppings are good (but not too many different toppings, if you're searching for this).
Edit: went again for a Salami pizza. Absolutely suggested, with also a little extra of spicy provided by them. The salami tasted so nice and in general the pizza again was tasty. Must come back a third time for the Penirli.