Istanbul Architecture: 5 Masterminds Who Shaped the Skyline

Stand anywhere on the Bosphorus shore and the skyline does the talking. A cascade of grey domes on one hill, a wedding-cake palace on the water, a railway terminal with a clock tower, a building on Istiklal that looks like it grew leaves. None of that happened by accident. Behind almost every silhouette you photograph in this city, there is a named architect who fought a sultan, a budget, an earthquake, or all three to get it built.

Here are the five I think did the most to make Istanbul look like Istanbul. Two are giants you have probably heard of. Two are quieter names whose buildings you have almost certainly walked past without knowing it. And one is an Italian who never meant to stay and ended up signing the city’s first Art Nouveau.

The 5 Architects, in Short

• Mimar Sinan: the imperial architect, 374 buildings, the domes you see everywhere.
• The Balyan Family: the dynasty that built the Bosphorus palaces.
• Mimar Kemaleddin Bey: the founder of a “national” Turkish style.
• Sedad Hakkı Eldem: the modernist who kept the old Ottoman house alive.
• Raimondo d’Aronco: the sultan’s Italian, and the city’s Art Nouveau.

Mimar Sinan

Mimar Sinan: The Architect Who Defined the Ottoman Skyline

If you only remember one name from this whole post, make it Sinan. Born around 1490 and originally a military engineer, he became chief royal architect to the Ottoman court and held the job for nearly fifty years, into his nineties. Across that career he was responsible for an almost unbelievable body of work: by the most-cited count, around 374 structures, including roughly 92 large mosques, dozens of smaller mosques, medreses, bathhouses, bridges and aqueducts. He did not just decorate Istanbul. He standardized how an imperial mosque should sit, breathe, and carry light.

Süleymaniye Mosque

Sinan himself ranked his own work, which I love. He called the Şehzade Mosque his “apprentice work,” the Süleymaniye Mosque of 1557 his “journeyman work,” and the Selimiye Mosque in Edirne, finished in 1575 when he was past eighty, his “masterpiece.” The Süleymaniye is the one most visitors meet first, crowning a hill above the Golden Horn, and it is the better field trip if you are based in the city. Closer to the Spice Bazaar, the small Rüstem Pasha Mosque is the opposite kind of pleasure: a jewel box drowning in İznik tiles, easy to miss from the street, worth the climb up the stairs.

What made Sinan special was not size, it was the engineering problem he kept solving. How do you sit a huge round dome on a square room and make the whole thing feel weightless and full of daylight? He answered it dozens of ways, learning from the Byzantine Hagia Sophia next door but pushing past it. Every architect who came after him in this city was, in some sense, answering to Sinan. If you want to see his range in one afternoon, his mosques sit near the top of any honest list of the most beautiful mosques in Istanbul.

Balyan Family

The Balyan Family: The Dynasty Behind the Palaces

Sinan gave Istanbul its domes. The Balyans gave it its palaces. This was not one architect but a dynasty of them, an Armenian family from the Ottoman capital who served as court architects across the eighteen-hundreds. Garabet Balyan and his sons Nigoğos and Sarkis are the names that recur, and between them they reshaped the entire Bosphorus waterfront in the empire’s last, most European-facing century.

Dolmabahçe Palace

Their signature is the Dolmabahçe Palace, the long white pile on the European shore that replaced Topkapı as the seat of government and announced, in baroque, neoclassical and rococo all at once, that the Ottomans now wanted to be read as a modern European power. Just up the water in Ortaköy, the little Ortaköy Mosque is theirs too, the Neo-Baroque silhouette beneath the Bosphorus Bridge that has become one of the most photographed scenes in the city.

And the building at the top of this page, Beylerbeyi Palace on the Asian shore, is also a Balyan commission, the summer palace built for Sultan Abdülaziz where Ottoman and Western detailing meet under one roof. The thread running through all of it is confidence: these were architects allowed to spend the imperial treasury on beauty, and they did. A slow walk along the Bosphorus toward sunset is really a tour of the Balyans’ greatest hits, whether you know their name or not.

Mimar Kemaleddin Bey

Mimar Kemaleddin Bey: The Man Who Invented a National Style

By the early twentieth century the empire was crumbling, and a younger generation of architects asked a hard question: what should a modern Turkish building look like? Mimar Kemaleddin Bey (1870-1927) was one of the two figures, alongside Vedat Tek, who answered it. Trained partly in Germany, he took the classical Ottoman vocabulary, the wide eaves, the pointed arches, the tilework, and applied it to new building types: apartment blocks, office hans, train-related structures. The result got a name, the First National Architecture movement, and it ran roughly from 1908 into the 1930s.

His best surviving work is the Fourth Vakıf Han, the big foundation office block near Sirkeci that still anchors its corner of Eminönü, finished over a long stretch from 1911 to 1926. The street beside it is named after him, which tells you how the city eventually decided to remember him.

Haydarpaşa Train Station

A quick honest correction, since you will see it claimed everywhere: the red-stone Haydarpaşa Station above was not Kemaleddin’s. It was designed by the German architects Otto Ritter and Helmut Cuno and opened in 1908, and after a long restoration it has reopened as a culture and arts venue on the Kadıköy shore. I include it because it belongs to exactly this era of the city, and because it is one of the most recognizable buildings on the whole Asian waterfront. Kemaleddin’s own everyday masterpiece is humbler and more useful: the Harikzedegan, or Tayyare, Apartments in Laleli, among the first reinforced-concrete buildings in Istanbul, built to house people burned out of their homes by a fire. The complex now runs as a five-star hotel, which is a very Istanbul second act. He also left small, dignified neighborhood mosques in places like Bebek that almost nobody photographs and everybody walks past.

Sedad Hakkı Eldem

Sedad Hakkı Eldem: Modern Buildings With an Old Soul

Sedad Hakkı Eldem (1908-1988) is the architect to know if you want to understand twentieth-century Istanbul, the city of concrete and offices and hotels rather than domes. Born in the city, he taught at the Academy of Fine Arts for decades and led what is usually called the Second National Architecture movement. His whole project was a single stubborn idea: that a modern building could still feel Turkish if you carried over the proportions, the wide overhanging roofs, and the rhythm of the old wooden Bosphorus house.

Istanbul Chamber of Commerce Building

The Istanbul Chamber of Commerce building, finished in 1955, is the clearest place to read that idea: clean modern lines, but with patterns and proportions that quietly nod to Ottoman design. His most decorated work, though, is the Zeyrek Social Security Complex, a set of offices stepping down a historic hillside near the old aqueduct. It won the Aga Khan Award for Architecture in 1986, a rare honor for a working office building, precisely because it manages to be big and modern without bullying the medieval neighborhood around it. He also co-designed the Istanbul University faculty building with Emin Onat and had a hand in the original Istanbul Hilton, the city’s first international hotel. Eldem mattered because he refused the easy options. Not a fake-Ottoman pastiche, not a generic glass box, but a third path most cities never find.

Botter Apartment

Raimondo d’Aronco: The Italian Who Brought Art Nouveau

The last name is the outsider, and he might be my favorite. Raimondo d’Aronco was born in 1857 near Udine in Italy and came to Istanbul almost by chance, then stayed to serve as chief palace architect to Sultan Abdülhamid II for about sixteen years. He is the man who introduced Art Nouveau to the city, but he did it in a very Istanbul way, folding Byzantine and Ottoman motifs into the curving, organic European style rather than just importing it whole.

His calling card is the Casa Botter, or Botter House, the apartment-and-workshop block he built around 1900 on İstiklal Avenue for the sultan’s Dutch tailor. For years it stood half-ruined behind scaffolding, a beautiful corpse on the city’s busiest pedestrian street. The good news, and the reason I’d put it on your walking route now: after a long municipal restoration it has reopened as the Casa Botter art and design center, with exhibition and event space inside, so you can finally see d’Aronco’s flowing iron and stonework up close instead of squinting at it through a fence. Over in Beşiktaş, the small Sheikh Zafir tomb, library and fountain complex is another of his early Art Nouveau experiments, easy to combine with a Bosphorus afternoon.

D’Aronco proved something important: Istanbul has never been a closed shop. The skyline absorbs whoever shows up with talent, Greek, Armenian, Italian, German, and makes their work part of the city. That openness is the through-line of this entire list.

How to See Their Work in One Trip

You do not need a degree to read this city’s architecture, you just need a route. A practical day: start at the Süleymaniye for Sinan, drop down to Eminönü for Kemaleddin’s Vakıf Han and the Rüstem Pasha tiles, then cross to Beyoğlu and walk Istiklal to the restored Casa Botter for d’Aronco. Save the Balyans for a separate Bosphorus day, ideally by ferry, so Dolmabahçe, Ortaköy and Beylerbeyi line up along the water the way their architects intended. If you want more context before you go, our overview of Istanbul’s historical places and the guide to the city’s remarkable towers both make good companions.

Five names, five centuries, one skyline. Once you can put a person behind the buildings, you stop seeing a pretty backdrop and start reading the city like a story. And in Istanbul, it is a very good story.