These structures are unique masterpieces of Iranian-Turkic architecture. Primarily designed and constructed by the master architect Ajami ibn Abubakr Nakhchivani, they laid the foundation for the "Nakhchivan School of Architecture," exerting a profound influence not only on Azerbaijani architecture but across the Middle East and Anatolia. During that era, Nakhchivan served as the capital of the powerful "Atabegs" state (the Eldegizid dynasty, 1136–1225 AD). These mausoleums were commissioned by the rulers of this dynasty to honor their spouses, commanders, and religious scholars. The most prominent of these, the Momine Khatun Mausoleum and the Yusif ibn Kuseyr Mausoleum, are currently on the UNESCO Tentative List and have been identified as requiring urgent safeguarding. Often referred to as "Atabey Gumbazi" (Atabeg Domes), these structures are rare examples of tower-shaped funerary architecture in the Islamic world, remaining remarkably intact after more than eight centuries.
1. The Momine Khatun Mausoleum
The Momine Khatun Mausoleum, undoubtedly the masterpiece of Ajami Nakhchivani, was built in 582 AH (1186–1187 AD) by the order of Shams al-Din Eldegiz, the founder of the Atabeg state, in honor of his wife, Momine Khatun. Its construction was completed by his son, Muhammad Jahan Pahlavan. Standing at approximately 25 meters today (historically over 30 meters), the structure is designed as a decagonal (ten-sided) tower. Each of the ten faces is adorned with complex and delicate geometric and floral inscriptions. The brickwork is so masterfully executed that many scholars consider it the pinnacle of brick architecture in the Caucasus and Iran. Beneath the structure lies a crypt (sardab), and above it, the main burial chamber is covered by a double dome, representing a highly advanced engineering feat for its time. The inscription on the building reflects Ajami’s philosophy regarding the immortality of art and architecture: "We depart, the world remains forever. We depart, the world remains. We die, this (monument) shall remain as our legacy."
2. The Yusif ibn Kuseyr Mausoleum
The Yusif ibn Kuseyr Mausoleum, also known as "Atababa," is slightly older, constructed in 557 AH (1161–1162 AD). Designed as an octagonal tower, its eight sides are beautifully decorated with geometric brickwork and Quranic inscriptions. Built for Yusif ibn Kuseyr—described in the inscriptions as the "Master of Sheiks, Beauty of Islam, Wisdom of the Faith, and Noble Khwaja"—this structure is unique among the tower-mausoleums of Azerbaijan due to its pyramidal roof made of brick, which has remained almost undamaged for over eight centuries. The walls are 80 centimeters thick, and the underground crypt features a cylindrical ventilation shaft in the center to prevent moisture. The name of the architect, "Ajami ibn Abubakr Nakhchivani," is inscribed on the left side of the main façade. Beyond these two structures, the architectural complex of the Atabegs in Nakhchivan originally included a congregational mosque, a madrasa, a caravanserai, and a grand gateway with two minarets; unfortunately, most of these were destroyed in subsequent centuries, leaving only the two minarets and an archway standing today.
Historical and Architectural Significance
The scientific and artistic value of the Nakhchivan mausoleums transcends the borders of the Republic of Azerbaijan, attracting architects and researchers from around the world. The style, a synthesis of Seljuk architecture, Iranian influences (Sassanid and early Islamic features), and indigenous Caucasian elements, subsequently influenced funerary architecture across the region. Similar examples can be observed in the "Se Gunbad" (Three Domes) near Lake Urmia (1184 AD), the "Gonbad-e Kabud" (Blue Dome) in Maragheh (1196 AD), the Golestan Mausoleum near Nakhchivan, the Garabaghlar Necropolis, and even the works of Mimar Sinan, the great Ottoman architect, in Istanbul.
Ajami Nakhchivani held such prestige during his lifetime that he earned the title "Rais al-Muhandisin" (Chief of Engineers), and Eastern sources refer to him as a man of great intellect. Notably, the use of brick and stone as primary materials in these structures played a significant role in historical Azerbaijani architecture: brick allowed for flexible geometric patterning, while stone provided strength and durability, combining to create wonders like the Momine Khatun Mausoleum.
Conclusion: A Shared Heritage
The mausoleums of Nakhchivan testify to the flourishing of science, art, and architecture in the heart of the Caucasus during the 12th century—a period that was not only characterized by conflict but also served as a center for cultural innovation and artistic exchange between Iran, Anatolia, the Caucasus, and the Islamic world. Ajami Nakhchivani emerged from the Iranian cultural sphere, yet his works transcended political boundaries, inspiring generations of architects in Turkey, Iran, and the Caucasus. These mausoleums serve as an excellent example of "shared architectural heritage"—a legacy that, beyond modern nationalisms, reminds us that the language of art and architecture knows no borders. Protecting these ancient monuments from natural and human threats is a collective responsibility for all ECO member states, as these structures are not merely the heritage of Azerbaijan, but the common legacy of the Turko-Iranian civilization within the ECO region