George Alvanos - Rooms
"Let's Go Greece" travel guide for more than ten years refers as the best place to stay in Kavala. In a preserved 3-floor building 350 years old, located in the old distict of Panagia (Virgin Mary) under the shandow of the Byzantine castle.
Lonely Planet refers as "Kavala's best budget option has nice rooms with shared bathrooms with refrigerators and sea views."
There are many references as this one in my-favourite-planet site.