Historical Koza Han (Silk Bazaar)

1. Essential Facts & Quick Visit Summary

Commissioned in 1491 by Ottoman Sultan Bayezid II and designed by royal architect Abdülula bin Puladşah, Historical Koza Han is the most magnificent Western terminus of the ancient Silk Road in Anatolia and the supreme masterpiece of Ottoman caravanserai architecture.

Situated in the historic heart of Osmangazi between the Grand Mosque (Ulu Cami) and the Orhan Gazi Complex, this living UNESCO World Heritage monument enchants travelers with its spacious stone courtyard shaded by centuries-old plane trees, an octagonal elevated kiosk mosque perched on eight marble pillars, and 95 vaulted merchant chambers spanning two arcaded levels. Celebrated for over five centuries as the premier international trading hub for raw silk and cocoons, Koza Han today welcomes global visitors with boutique silk galleries, traditional artisans, and open-air cafés serving ember-roasted Turkish coffee.

2. History and Foundation: Bayezid II Era and the Silk Road Legacy

The construction of Koza Han stands as an architectural testament to the Ottoman Empire's dominance over global silk trade routes in the late 15th century. Sultan Bayezid II, son of Mehmed the Conqueror, required substantial and permanent endowment revenues (waqf) to maintain the grand mosque, madrasa, and charitable public kitchen he was constructing in Istanbul. To generate sustainable wealth, he ordered the construction of a monumental commercial caravanserai in Bursa, the unquestioned capital of the international silk trade.

Recorded in early endowment deeds as "Han-ı Cedid" (The New Han), "Han-ı Cedid-i Evvel", or "İpek Hanı" (The Silk Han), groundbreaking occurred in March 1491. Under the master design of imperial architect Abdülula bin Puladşah, the monumental complex was completed in the autumn of the same year with extraordinary speed. From its opening days, Koza Han became the bustling headquarters for international merchants hailing from Venice, Genoa, Florence, Persia, and Damascus.

Farmers from the mountain villages of Bursa brought tons of freshly harvested silkworm cocoons directly into this courtyard. They were weighed on official imperial scales and auctioned off to local and foreign textile masters. The immense customs and rental revenues gathered here successfully funded charitable soup kitchens in Istanbul for centuries, embodying the profound social purpose of Ottoman architecture.

3. Architectural Plan and Engineering: Two-Storey Caravanserai Design

Koza Han represents the classical zenith of Ottoman caravanserai engineering in terms of proportion, symmetry, and materials. Built on a rectangular layout oriented east-west, it encloses a central paved courtyard measuring approximately 45.90 by 37.50 meters.

The walls feature the signature Ottoman **alternating masonry (almaşık örgü)** technique, layering two courses of finely dressed ashlar limestone with two or three courses of horizontal red brick. This construction technique provided structural elasticity that successfully dissipated destructive seismic shockwaves across six centuries of earthquakes.

The caravanserai is divided into two distinct functional levels:

• Ground Floor (45 Chambers): Barrel-vaulted chambers opening directly onto the stone courtyard. Historically, these rooms served as stables for pack animals (horses, mules, camels), wholesale storage warehouses, and secure deposit vaults.
• Upper Floor (50 Chambers): Accessible via stone flights of stairs. The upper chambers open onto an exquisite vaulted gallery supported by brick arches and marble pillars. These rooms featured fireplaces and outward-facing windows, serving as merchant sleeping quarters, trading offices, and negotiation rooms.

The northern monumental portal (Taçkapı) facing the Covered Bazaar is an absolute marvel of stone carving, boasting turquoise tile insets, geometric stalactite muqarnas vaults, and heavy iron-studded oak doors.

4. The Courtyard Fountain and Elevated Köşk Masjid

In the exact center of Koza Han's tranquil courtyard stands an architectural gem rarely seen in Ottoman caravanserais: the independent, two-tier **Köşk Masjid and Ablution Fountain**.

While caravanserais traditionally placed prayer rooms over the entrance gate, Koza Han positioned its mosque in the center of the courtyard. This allowed traveling merchants to worship while keeping a watchful eye on their valuable silk merchandise below:

On the ground level, an octagonal white marble basin features bronze taps supplying fresh spring water for ablutions. Encircling this fountain are **eight thick stone piers** joined by wide pointed arches that elevate the octagonal prayer chapel above. A graceful double flight of marble stairs on the northern facade leads worshippers up into the chapel.

The lead-covered dome incorporates inverted terracotta jars in its masonry corners to optimize sound resonance. The continuous splashing of the fountain below functions as a natural acoustic buffer, masking the busy market chatter and creating an aura of serenity inside the chapel.

5. The Silk Commerce, Cocoon Auctions and Living Heritage

Bursa inherited ancient sericulture traditions from Roman and Byzantine eras, elevating silk production to global acclaim under the Ottomans. As Silk Road caravans unloaded raw silk in Bursa, the city became the primary silk supplier to European royal courts.

For centuries, Koza Han buzzed with immense activity during June and July. Mountain villagers transported giant burlap sacks filled with white and yellow silkworm cocoons into the courtyard. Imperial inspectors weighed the cocoons, and loud public auctions (koza mezatı) distributed them to local silk-reeling filatures and European traders.

While modern industrial manufacturing has relocated to specialized cooperatives, Koza Han preserves this heritage through high-end retail craftsmanship. The 50 rooms of the upper gallery house over 40 prestigious boutiques offering authentic hand-woven Bursa silk scarves, pashminas, ties, and brocades.

6. Historic Events, Queen Elizabeth II's Visit and Cultural Memory

Over its 500-year history, Koza Han has welcomed emperors, ambassadors, and literary figures. In modern times, its most celebrated international event took place on **May 15, 2008, when Queen Elizabeth II of the United Kingdom and Prince Philip visited Koza Han** during their official state visit to Turkey.

Her Majesty entered through the grand northern portal, walked beneath the plane trees, and ascended to the upper silk loggia. She observed traditional Bursa silk weaving demonstrations on handlooms, purchased silk scarves and fabric from local artisans, and enjoyed Turkish tea in the open gallery. This royal visit cemented Koza Han's reputation as a globally recognized heritage destination.

7. Earthquakes, Fires and Conservation Milestones

Koza Han has weathered Bursa's greatest urban cataclysms:

• The 1855 Great Bursa Earthquake: The disaster collapsed several upper arcades and damaged the Köşk Masjid. Prompt restoration was commissioned under Sultan Abdülaziz by the Ministry of Foundations.
• The 1958 Grand Bazaar Conflagration: While wooden markets surrounding the han were consumed by fire, Koza Han's thick stone walls and brick vaults prevented total destruction, preserving its core masonry intact.
• UNESCO World Heritage Preservation: Extensively restored in the 1970s, Koza Han was inscribed on the UNESCO World Heritage List in 2014 under "Bursa and Cumalıkızık: The Birth of the Ottoman Empire", ensuring rigorous ongoing conservation.

8. Visitor Planning Guide: Who & When to Visit

To maximize your experience, here are tailored recommendations:

• Silk & Souvenir Shoppers: The upper gallery shops open fully around 10:00 AM. For peaceful browsing and personal service, visit on **weekdays between 10:30 AM and 1:00 PM**. Bargaining is customary for multi-item purchases.
• Coffee & Atmosphere Lovers: Relaxing beneath the ancient plane trees with an ember-roasted Turkish coffee is an unforgettable ritual. The courtyard is quietest between 08:30 AM and 10:30 AM.
• Photographers: The most iconic photographic perspective is captured from the eastern upper gallery, framing the Köşk Masjid and ancient plane trees in a single shot. Morning light (09:00 - 11:00 AM) casts soft, balanced shadows.
• Accessibility: The ground courtyard is flat and easily navigated with wheelchairs or strollers via stone entrance ramps. Access to the upper gallery is via steep historic stone steps.

9. Visitor Guidelines, Silk Authentication and Photography Etiquette

• Admission Policy: Entry to the courtyard and shops is **free of charge**, open seven days a week.
• Authentic Silk Verification: Always inquire if fabrics are 100% pure silk (saf ipek). Genuine Bursa silk glides smoothly, warms immediately against the skin, and displays a subtle natural luster rather than an artificial synthetic shine.
• Photography & Drones: Handheld photography is welcome. Unauthorized drone flights are strictly prohibited across the historic bazaar quarter for safety and heritage regulations.

10. Transportation, Neighborhood Itineraries and Culinary Breaks

Koza Han is conveniently situated in the central Osmangazi district:

• By Public Transit: Take the BursaRay metro to Şehreküstü Station and follow the Covered Bazaar exit for an easy 5-minute walk. Alternatively, take the T1 Nostalgic Tram directly to the 'Ulu Cami' stop, just 2 minutes away.
• Parking: Park at Zafer Plaza Multi-Storey Car Park (400 m) or Cemal Nadir Street Car Park (300 m).
• Recommended Integrated Itinerary: Exit Koza Han's southern gate to arrive at Bursa Grand Mosque (Ulu Cami) in just 1 minute. Next, step out through the northern portal into the historic corridors of the Bursa Covered Bazaar. Complete your cultural excursion with a savory meal of Bursa Pideli Köfte and taste renowned Bursa Candied Chestnuts, following our Historical Bazaar and Khans Route guide.