Photo: Balkanique, CC BY-SA 4.0 via Wikimedia Commons
A vast hilltop redoubt and fortress built from 1829 against Russian attack, though its finest hour was in the Balkan Wars of 1913. It had little value against 20th century weaponry and fell derelict. Restoration has been under way since 2011, with no end in sight, so the fortress remains fenced off, though you can still access Hıdır Baba park.
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Sağlık Müzesi
This complex was founded by Sultan Bayezid II in 1484. As well as the hospital there was a medical school, mosque, guesthouse, almshouse and Turkish baths. Initially it was a general medical and surgical hospital but it came to specialise in mental health. It followed enlightened holistic methods before these were taken up in the west: instead of locking patients into cells with shackles, they used meditative music, fragrances and flower gardens. It's been incorporated into Trakya University, and the museum displays miniatures from Ottoman medical textbooks and models of patients.
Burmalı (Serpent) Mosque
Mosque built 1438-1447, its name refers to the three balconies or galleries on its tallest minaret. The other three minarets are all of different designs. The mosque interior has a colourfully decorated central dome, surrounded by smaller domes in different colour patterns, supported by stately columns.
(Adalet Kasrı) by Fatih Bridge is a sturdy square tower, the last intact remnant of the palace.
The great fire of 1905 destroyed its predecessor, so this synagogue was opened in 1909 to serve the large Jewish population. They were mostly Sephardic, descended from those expelled from Spain in 1492 who fled to Ottoman territory. The synagogue is in Moorish Revival style and modeled on the Leopoldstädter Tempel in Vienna. It was abandoned in 1983 and fell derelict as its community left for Israel and elsewhere. It was restored and re-opened in 2015 with a service, but isn't routinely used for worship. There's a small museum within.
Eski Cami
This was built in the 15th century, so it's the oldest and smallest of the city's three imperial mosques. It's a low building with nine domes and two minarets, with striking calligraphy within.
Rüstempaşa Kervansaray
historic caravansaray with a magnificent courtyard, now a café and hotel