Omonia is the district for when you are looking for a budget hotel.
Omonia is the neighbourhood for you if you like to explore the rawer side of Athens. Omonia Square does not have a good reputation, many travel guides tell you to stay away from here. Indeed, it is not the best neighbourhood in Athens, but also not as dangerous as some would have you believe. Not many 'old stones' here, as this area was outside the city walls in ancient times. But you will see 19th-century architectural gems. When Omonia Square was built in the 19th century, it was the city's posh square. You have to have some imagination to remember that. Omonia is full of budget accommodation.