# Valens Aqueduct (Bozdoğan Kemeri), Istanbul

> A 4th-century Roman aqueduct whose two tiers of stone arches, up to 29 m high, stride over Atatürk Boulevard between the old city's third and fourth hills. It's free and always open — you see it from the street, no ticket needed. Treat it as a 10–15-minute stop on the way to the Süleymaniye or Fatih Mosque, not a trip in itself.

Web page: https://yesgo.io/turkey/istanbul/valens-aqueduct

- City: [Istanbul](https://yesgo.io/turkey/istanbul), Turkey
- YesGo score: 45/100 (Yes, if nearby)
- Time on site: 15 min
- With kids: Fine with kids
- Entry: Free, no ticket
- Hours: 24 hours — it's an open-air structure over the road
- Walking on top: Not possible: there's no visitor access to the top
- Time needed: 10–15 minutes, up to 30 with Saraçhane Park
- Metro: M2 to Vezneciler, ≈ 10 min walk
- Tram: T1 to Laleli-Üniversite, ≈ 12–13 min walk
- Best view: From Atatürk Boulevard and Saraçhane Park by City Hall
- Address: Atatürk Bulvarı, Fatih
- Coordinates: 41.01616, 28.95521
- Facts checked: 29.10.2026

## Key facts

- **AD 368** — completed under Emperor Valens (source: English Wikipedia; Livius.org (Russian Wikipedia: 368–375))
- **≈ 970 m** — length of the arched bridge between the hills (source: TDV Encyclopedia of Islam; Russian Wikipedia (English Wikipedia: 921 m surviving))
- **Up to ≈ 29 m** — height above ground at the deepest point (source: TDV Encyclopedia of Islam; English Wikipedia)
- **2 tiers** — of arches in the middle section, one tier towards the ends (source: TDV Encyclopedia of Islam; English Wikipedia)
- **3rd and 4th hills** — the aqueduct bridges the valley between Beyazıt and Fatih (source: TDV Encyclopedia of Islam; English Wikipedia)
- **Bozdoğan Kemeri** — the Turkish name; where “Bozdoğan” comes from is disputed (source: TDV Encyclopedia of Islam; Russian Wikipedia)
- **Hadrian** — work on the city's water supply began under him, in the 2nd century (source: TDV Encyclopedia of Islam; English Wikipedia)
- **16th century** — Suleiman the Magnificent repaired it and used it to carry water to the Süleymaniye (source: TDV Encyclopedia of Islam; English Wikipedia)
- **Late 1690s** — Sultan Mustafa II restored the eastern arches (source: TDV Encyclopedia of Islam; English Wikipedia)
- **Theodosius Cistern** — was fed by this aqueduct (source: English and Russian Wikipedia)

## Is the Valens Aqueduct free? Hours and access

Yes — it's **free and open 24 hours**. There's no gate, ticket office or official visitor site: the aqueduct is a monument standing over a public road, and you look at it from the pavement.

You can't climb up or walk along the top; there's no visitor access. The best views are from Atatürk Boulevard and the adjoining Saraçhane Park.

> **Not worth a trip on its own** Ten to fifteen minutes is enough: you can't go inside or up, and a busy boulevard runs underneath. It's great as a stop between the [Süleymaniye Mosque](https://yesgo.io/turkey/istanbul/suleymaniye-mosque) and [Fatih Mosque](https://yesgo.io/turkey/istanbul/fatih-mosque), where it costs you almost no extra time.

## How to get to the Valens Aqueduct

1. Take metro M2 to Vezneciler–İstanbul Üniversitesi and exit towards Şehzade Mosque — about 10 minutes' walk west.
2. Or take tram T1 from Sultanahmet to Laleli-Üniversite (about 10 minutes), then walk 12–13 minutes north.
3. From the T1 Aksaray stop, walk up Atatürk Boulevard — you'll see the arches ahead, about 15 minutes.
4. On foot from the Süleymaniye Mosque: 10–15 minutes through Vefa.
5. Carry on uphill to Fatih Mosque — about 10 minutes.

## Is the Valens Aqueduct worth it?

Worth it if you're walking between the Süleymaniye and Fatih, or heading out to [Chora](https://yesgo.io/turkey/istanbul/chora-church) and [Balat](https://yesgo.io/turkey/istanbul/balat) — it's right on the way and it's one of the few big Roman structures still standing in the city. Skip it if you only have a day around Sultanahmet: the [Basilica Cistern](https://yesgo.io/turkey/istanbul/basilica-cistern) and the [Hippodrome](https://yesgo.io/turkey/istanbul/hippodrome) give you more Roman Istanbul for the time.

## A short history

The arches carried a water channel that brought water by gravity from hills outside the walls into central Constantinople. Begun under Constantius II, the aqueduct was **completed under Emperor Valens in 368** — hence the name. Work on a water supply had started under Hadrian in the 2nd century, though its link to this bridge is unproven.

It fed Byzantine cisterns and palaces, among them the [Theodosius Cistern](https://yesgo.io/turkey/istanbul/theodosius-cistern). After 1453 the Ottomans repaired it and plugged it into their own network; under **Suleiman the Magnificent** it carried water to the Süleymaniye.

Sections were rebuilt more than once — **Mustafa II** restored the eastern arches in the late 1690s — so Roman masonry and Ottoman repairs sit side by side in the same bridge.

## What to see

- The double row of arches over Atatürk Boulevard — the classic view, best from the pavement by Saraçhane Park.
- The masonry: Roman blocks and later Ottoman repairs look clearly different.
- The western end towards Zeyrek, where the arches drop lower between houses.
- Sinan's Şehzade Mosque at the eastern end, two minutes away.
- Evenings, when traffic eases, are calmer for photos.

## Roman and Byzantine Istanbul: how it compares

|  | Valens Aqueduct | Basilica Cistern | Hippodrome |
| --- | --- | --- | --- |
| Built | 368 | 532 | 203, enlarged after 324 |
| Entry | Free | Paid, ≈ 1,950 TL by day | Free |
| What you see | Arches over a road | 336 columns over water | Obelisks and a column |
| Time needed | 10–15 min | 30–45 min | 20–30 min |
| Where | Fatih, Atatürk Boulevard | Sultanahmet | Sultanahmet |

With an hour for Roman Istanbul, start with the Basilica Cistern and the Hippodrome, which are side by side. Add the aqueduct when you head to the Süleymaniye or Fatih.

## Before you go: checklist

- [ ] Aqueduct planned next to the Süleymaniye or Fatih
- [ ] Comfortable shoes — it's uphill
- [ ] Cross the boulevard only at crossings — traffic is heavy
- [ ] 10–15 minutes set aside for the arches

## Istanbul's historic sights compared

Every historic sight in Istanbul rated by YesGo.

- [Hagia Sophia](https://yesgo.io/turkey/istanbul/hagia-sophia) — YesGo score 91/100 (Yes, go) · 1 h 15 min · €25
- [Blue Mosque](https://yesgo.io/turkey/istanbul/blue-mosque) — YesGo score 86/100 (Yes, go) · 45 min · Free
- [Hippodrome (Sultanahmet Square)](https://yesgo.io/turkey/istanbul/hippodrome) — YesGo score 77/100 (Yes, go) · 20 min · Free
- [Basilica Cistern](https://yesgo.io/turkey/istanbul/basilica-cistern) — YesGo score 70/100 (Yes, go) · 45 min · ≈ 1,950–2,250 TL
- [Topkapı Palace](https://yesgo.io/turkey/istanbul/topkapi-palace) — YesGo score 63/100 (Yes, go) · 3 h · 2,750 TL with the Harem
- [Fatih Mosque](https://yesgo.io/turkey/istanbul/fatih-mosque) — YesGo score 52/100 (Yes, go) · 30 min · Free
- [Little Hagia Sophia](https://yesgo.io/turkey/istanbul/little-hagia-sophia) — YesGo score 46/100 (Yes, if nearby) · 20 min · Free
- [Valens Aqueduct](https://yesgo.io/turkey/istanbul/valens-aqueduct) — YesGo score 45/100 (Yes, if nearby) · 15 min · Free
- [Üsküdar](https://yesgo.io/turkey/istanbul/uskudar) — YesGo score 45/100 (Yes, if nearby) · 1 h 30 min · Free
- [New Mosque](https://yesgo.io/turkey/istanbul/new-mosque) — YesGo score 44/100 (Yes, if nearby) · 20 min · Free
- [Chora Church](https://yesgo.io/turkey/istanbul/chora-church) — YesGo score 42/100 (Yes, if nearby) · 45 min · €20
- [Taksim Square](https://yesgo.io/turkey/istanbul/taksim-square) — YesGo score 41/100 (Yes, if nearby) · 15 min · Free
- [Museum of Innocence](https://yesgo.io/turkey/istanbul/museum-of-innocence) — YesGo score 41/100 (Yes, if nearby) · 1 h · 800 TL
- [Karaköy](https://yesgo.io/turkey/istanbul/karakoy) — YesGo score 40/100 (Yes, if nearby) · 1 h 30 min · Free
- [Theodosius Cistern](https://yesgo.io/turkey/istanbul/theodosius-cistern) — YesGo score 39/100 (Yes, if nearby) · 30 min · 900 TL
- [Balat and Fener](https://yesgo.io/turkey/istanbul/balat) — YesGo score 37/100 (Yes, if nearby) · 2 h · Free
- [Istanbul Archaeology Museums](https://yesgo.io/turkey/istanbul/archaeology-museums) — YesGo score 36/100 (Yes, if nearby) · 2 h · €15
- [Yıldız Palace](https://yesgo.io/turkey/istanbul/yildiz-palace) — YesGo score 35/100 (Yes, if nearby) · 1 h 15 min · 900 TL
- [Miniatürk](https://yesgo.io/turkey/istanbul/miniaturk) — YesGo score 30/100 (Yes, if nearby) · 1 h 30 min · 900 TL
- [Rahmi M. Koç Museum](https://yesgo.io/turkey/istanbul/rahmi-koc-museum) — YesGo score 30/100 (Yes, if nearby) · 2 h · 550 TL
- [Rumelihisarı](https://yesgo.io/turkey/istanbul/rumeli-fortress) — YesGo score 29/100 (Yes, if nearby) · 1 h · €6

## From the Grand Bazaar to Chora via the aqueduct

The Grand Bazaar, up to the Süleymaniye, through Vefa to the aqueduct, uphill to Fatih Mosque and on to Chora.

1. [Grand Bazaar](https://yesgo.io/turkey/istanbul/grand-bazaar) — YesGo score 61/100 (Yes, go) · 1 h 30 min · Free
2. [Süleymaniye Mosque](https://yesgo.io/turkey/istanbul/suleymaniye-mosque) — YesGo score 70/100 (Yes, go) · 45 min · Free
3. [Valens Aqueduct](https://yesgo.io/turkey/istanbul/valens-aqueduct) — YesGo score 45/100 (Yes, if nearby) · 15 min · Free
4. [Fatih Mosque](https://yesgo.io/turkey/istanbul/fatih-mosque) — YesGo score 52/100 (Yes, go) · 30 min · Free
5. [Chora Church](https://yesgo.io/turkey/istanbul/chora-church) — YesGo score 42/100 (Yes, if nearby) · 45 min · €20

## Not to be confused with

Valens Aqueduct and Bozdoğan Kemeri are the same structure. It was part of a much larger water system; Suleiman the Magnificent's Ottoman aqueducts are separate structures far out in the Belgrad Forest.

## Tips

- Slot it between the Süleymaniye Mosque and Fatih Mosque — no need to come specially.
- The best view is from Atatürk Boulevard by Saraçhane Park, where both tiers show.
- Use the pedestrian crossings — traffic under the arches is heavy.
- Pop into Şehzade Mosque at the eastern end, two minutes away.
- Metro M2 Vezneciler is a shorter, easier walk than the tram.

## Questions

### Is the Valens Aqueduct free?

Yes. It's an open-air monument over a public road — no ticket, no ticket office.

### What are the Valens Aqueduct opening hours?

There are none: you can see it 24 hours a day from the street.

### Can you walk on top of the Valens Aqueduct?

No, there's no visitor access to the top. You see it from below, from the pavement and Saraçhane Park.

### How do I get to the Valens Aqueduct?

Metro M2 to Vezneciler and about 10 minutes on foot, or tram T1 to Laleli-Üniversite and a 12–13-minute walk.

### Is the Valens Aqueduct worth visiting?

As a quick stop on the way to the Süleymaniye, Fatih or Chora, yes. It isn't worth a separate trip — 10–15 minutes is enough.

### How tall is the Valens Aqueduct?

Up to about 29 m above ground at its highest point, and nearly a kilometre long.

### When was the Valens Aqueduct built?

It was completed in 368 under Emperor Valens; construction had begun under Constantius II.

### What was the Valens Aqueduct used for?

It carried water into Constantinople's cisterns and palaces; the Ottomans later repaired it and used it to supply mosques including the Süleymaniye.

### How long do you need at the Valens Aqueduct?

10–15 minutes; about half an hour with Saraçhane Park and Şehzade Mosque.

## How we checked

The aqueduct has no official visitor site or ticket office: it's an open monument over a road, so price and hours need no official source. No official source states outright that the top is closed, so that row is marked “verifying”. Length differs: the TDV Encyclopedia and Russian Wikipedia give about 971 m; English Wikipedia gives 971 m for the original bridge and 921 m for what survives — we say “nearly a kilometre”. Height: TDV and English Wikipedia give 28–29 m; Russian Wikipedia 26 m originally and 20 m today — we show “up to ≈ 29 m”. Date: English Wikipedia and Livius say 368, Russian Wikipedia 368–375. Mustafa II's repair is dated 1696/97 (English Wikipedia) and 1697–98 (TDV) — we say “late 1690s”. Walking times come from guides and maps and are marked “verifying”.

## Sources

- TDV Encyclopedia of Islam: “Bozdoğan Kemeri” (S. Eyice)
- English and Russian Wikipedia: Aqueduct of Valens; Wikidata Q952924
- Livius.org: Constantinople, Aqueduct of Valens
- Kültür Envanteri: Bozdoğan Kemeri
- Routard and Trek.zone guides, 2026 — walking times from transport

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