Alessandro Gasparini
Google
The Hagia Sophia is one of the most important Byzantine Orthodox churches in Thessaloniki.
Unfortunately, we visited in the late afternoon and all the lights were off, so the photos I took are quite dark.
That said, the church is richly decorated with brightly colored and golden frescoes dating from the eighth to ninth centuries.
For a small donation of a few euros, a small booklet in English is available containing historical information about the church and the works it contains.
Religious services are still held in this church.
Be careful with your dress code; I haven't seen an explicit code, but I would avoid ripped pants, skimpy clothing, or shirts with disrespectful writings or images.