Here is an interactive map of Thessaloniki I have found in the web.
The site is very rich with various maps.
Hyatt Regency Thessaloniki Thessaloniki
5 Reviews and 116 Opinions Hyatt Regency Hotels & Tourism... (Thessaloniki) S.A.
Capsis Bristol Hotel Thessaloniki
1 Review and 37 Opinions It's a really lovely place to stay and enjoy the center of Thessaloniki. It is situated in a...
City Hotel Thessaloniki
4 Reviews and 29 Opinions i really loved the facility of being in the heart of the centre,it is a hotel that smells european...