Karaköy belongs to one of Istanbul’s oldest and most historically layered neighborhoods. For centuries it served as the port of Galata — a hub of intense trade, cultural exchange, and meetings between merchants from all corners of the world. During the Ottoman era, the area was one of the city’s most important financial centers, with banks, trading houses, and shipping companies lining its streets, handling commerce between Europe and the Middle East.
The district was also remarkably cosmopolitan. Galata and Karaköy were home to Greeks, Armenians, Sephardic Jews, Italian merchants, and Levantine communities, leaving a lasting imprint on the area’s architecture and urban layout.
Even the neighborhood’s name isn’t entirely straightforward. Karaköy literally translates to “black village,” though most researchers believe this doesn’t refer to the color of the place itself. The name’s origin is often linked to the merchant communities who once inhabited Galata, though its exact etymology remains a subject of debate among historians.
Here are 10 facts about Karaköy that offer a completely different perspective on this part of Istanbul.
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1. Karaköy is home to one of the oldest underground railways in the world
One of the most remarkable pieces of infrastructure in Istanbul is the Tünel, which connects Karaköy to Beyoğlu. The line opened in 1875 and is considered the second-oldest underground urban railway in the world, second only to the London Underground.
Technically, though, it isn’t a classic subway. The system operates as a funicular railway — two cars connected by a cable move in opposite directions, with one climbing the steep hill toward Beyoğlu while the other descends to Karaköy.
The line was built to make it easier to cover the very steep stretch between the port district of Galata and the former European quarter of Pera. What once took a strenuous fifteen-minute climb was reduced to just a few minutes.
2. Karaköy once had a remarkable mosque designed by an Art Nouveau architect
One of the district’s most unusual buildings was the Merzifonlu Kara Mustafa Paşa Mosque, known as the Karaköy Mosque. It was a striking example of fevkani-style architecture, typical of the densely built commercial districts of the Ottoman Empire.
In buildings of this type, the lower floors were occupied by shops, while the prayer hall sat above. In this case, the ground floor and second floor housed shops, with the prayer space itself located on the third level.
At the start of the 20th century, the mosque was rebuilt according to a design by the Italian architect Raimondo D’Aronco, who worked in Istanbul as a palace architect and played a key role in popularizing the Art Nouveau style throughout the city.
The building was demolished in 1958 during the redevelopment of the area around the Galata Bridge. Some of its architectural elements were meant to be reused elsewhere, but part of them were lost during sea transport.
3. Bankalar Caddesi was the financial heart of the Ottoman Empire
A few minutes’ walk from the waterfront lies Bankalar Caddesi, one of the most important financial streets of old Istanbul. Throughout the 19th and early 20th centuries, it was home to Ottoman banks, European financial institutions, and numerous insurance and trading firms.
The street was previously known as Voyvoda Caddesi and served as the concentration point for the empire’s most important financial institutions. French, Italian, and British banks operated here, alongside Ottoman credit institutions.
Many of the monumental bank buildings from the turn of the 19th and 20th centuries still stand today. A number of them are considered defining examples of the architectural style known in Turkey as the First National Architectural Movement.
4. Karaköy hides churches on the rooftops of its buildings
One of the most surprising architectural features of this part of the city is its so-called “rooftop churches.” Some Christian places of worship in the Galata district aren’t located at street level at all, but rather on the top floors of buildings — or directly on the roofs.
This unusual solution came from the neighborhood’s extremely dense construction and the limited space available in the port district. In the 19th century, Galata was home to many Christian communities, primarily Greeks and Armenians.
From street level, it’s often impossible to tell that a building contains a place of worship. Only by stepping inside does one discover the hidden sacred space, which for decades functioned almost invisibly to passersby.
5. Karaköy was the starting point of a journey that changed Turkish history
On May 16, 1919, the ship Bandırma departed from the waterfront near Karaköy, carrying Mustafa Kemal Atatürk to Samsun on the Black Sea coast.
This journey is widely regarded as the symbolic beginning of the Turkish War of Independence. The events that began in Samsun would, a few years later, lead to the founding of the Republic of Turkey and mark the end of the Ottoman Empire.
While the departure point itself isn’t among the city’s most visited tourist attractions today, Turkish historiography treats it as one of the symbolic moments in the birth of the modern state.
6. Tütün Han is over a century old and is undergoing a major transformation
One of Karaköy’s most distinctive buildings is Tütün Han, designed in 1911 by architect Edoardo De Nari. It was built during a period of rapid financial growth in this part of the city.
For many years, the building housed trading offices, law firms, and a branch of İş Bankası, one of the most important banks in the Republic of Turkey. It was part of the dense network of financial institutions once operating throughout the Galata district.
Today, Tütün Han is undergoing an adaptive transformation into a luxury hotel — one example of the broader trend of revitalizing Karaköy’s historic buildings.
7. Galataport transformed the entire waterfront
One of the largest urban development projects in this part of Istanbul in recent years is Galataport, which has completely reshaped Karaköy’s historic port waterfront.
The port was designed to combine the function of a cruise ship terminal with a publicly accessible urban space. One of the project’s most unusual features is its underground passenger terminal.
Inside, cruise passengers go through check-in, security screening, and baggage handling. This keeps the street level open for residents and tourists to stroll freely.
8. One of Istanbul’s most important trade routes once ran through Karaköy
For centuries, the district was a key hub of maritime trade. Goods brought by ship to the port of Galata were then distributed to the warehouses, trading offices, and banks located nearby.
Its proximity to the port meant Karaköy acted as a bridge between maritime trade and finance. Merchants could unload their goods, sign trade contracts, and secure loans from the banks along Bankalar Caddesi — all in one place.
This concentration of port and financial functions was one of the main reasons the district grew so rapidly during the 19th century.
9. Karaköy is home to one of this part of the city’s oldest fish markets
The area around the Galata Bridge has long been associated with the trade of fish and seafood from the Sea of Marmara and the Bosphorus. Small markets and fish stalls in Karaköy served both local residents and restaurants.
The tradition of selling fresh fish in this part of the city dates back to Ottoman times. The port’s proximity and easy access to Bosphorus catches made it a natural location for this trade.
To this day, the area around the Galata Bridge and the Karaköy waterfront remains one of the places where you can watch the daily rhythm of fishermen and fish vendors at work.
10. Kamondo Han recalls the power of a Jewish banking family
One of the most distinctive buildings along Bankalar Caddesi is Kamondo Han, built in the second half of the 19th century by the influential Camondo family. This Sephardic banking family played a significant role in the economic life of the late Ottoman Empire.
The Camondo family financed urban development projects, educational institutions, and commercial ventures in Galata. It was also on their initiative that the famous Camondo Stairs (Kamondo Merdivenleri) were built, leading from Bankalar Caddesi up toward the Galata district.
The Kamondo Han building itself served as trading and financial offices for the family’s banking operations. It remains one of the most recognizable examples of commercial architecture in this part of Istanbul, a reminder of the era when Galata was one of the region’s most important financial centers.
The modern transformation of Karaköy
Over the past decade or so, Karaköy has become one of Istanbul’s fastest-changing neighborhoods. As recently as the early 2000s, the area was dominated by workshops, port warehouses, hardware shops, and wholesalers tied to maritime shipping. Today, the signs of gentrification and tourism-driven revitalization are increasingly visible, reshaping the character of the entire district.
A major role in this shift has been played by the opening of new waterfront promenades along the Bosphorus and the arrival of investors from the restaurant and hospitality industries. Former warehouses and offices have given way to restaurants, bars, art galleries, and specialty coffee shops, quickly drawing in a younger generation of Istanbul residents as well as tourists. Karaköy has become one of the places where the city’s modern culinary scene is most visible — from contemporary bistros to restaurants reinterpreting Anatolian cuisine.
The function of many historic buildings is changing too. Structures that until recently served as warehouses, trading offices, or commercial spaces are gradually being restored and converted into boutique hotels, creative spaces, and apartments — part of a broader trend of transforming former port districts into attractive urban spaces.
Karaköy is also drawing in the art and design world. Many former workshops have become design studios, contemporary art galleries, and exhibition spaces, giving the neighborhood an increasingly creative edge. As a result, the area has become a fixture on Istanbul’s cultural map, particularly popular among the city’s younger residents.
Today’s Karaköy is a place where historic architecture meets a new urban purpose. Once a port district of banks and warehouses, it is steadily transforming into a fashionable hub for tourism, dining, and culture — all while keeping visible traces of its centuries-long history.
