Arch of Galerius and Rotunda

Galerius built both around AD 300 as part of a palace complex that also included the palace itself and a hippodrome. The arch, known locally as Kamara, spanned the Via Egnatia and is covered in relief panels showing his eastern campaigns, ceremonial scenes and imperial imagery, weathered but legible; only part of the original structure survives. Two hundred metres north stands the Rotunda, a cylinder over 24 metres across with walls six metres thick, probably intended as a mausoleum or temple; it was converted into a Christian church in the late fourth century and given magnificent gold mosaics of saints in the dome, then became a mosque under the Ottomans, whose minaret still stands beside it, the only one left in the city. Both are UNESCO-listed among Thessaloniki's palaeochristian monuments.

What you actually see

• The relief panels - carved scenes covering the surviving arch piers.
• The Rotunda dome - a vast brick cylinder with surviving gold mosaics.
• The minaret - the only Ottoman minaret remaining in Thessaloniki.
• The palace remains - excavated ruins of Galerius's complex nearby.

When to go

Year-round; both stand in the busy centre and are easily combined. The Rotunda keeps museum hours and closes on some weekdays, while the arch is always accessible outdoors.

Honest expectations

Restoration work has kept scaffolding inside the Rotunda for long periods, and the mosaics survive only in patches, high up. The arch sits at a busy junction with traffic on all sides. Both visits are short.

Nearby

The Roman forum lies west, the White Tower and seafront south, and the upper town climbs behind.