17 September 2025 The Future is the Product of the Past

1,500-year-old secret underground passage uncovered in Istanbul

During the ongoing excavations in the ruins of Saint Polyeuktos Church in Istanbul’s Saraçhane neighborhood, which was destroyed during the Latin invasion, a 1,500-year-old underground passage has been discovered.

A previously unknown underground passage about 20 meters (65 feet) from the nearby Haşim Işçan Passage was discovered. The carved marble blocks and reliefs in the underground passage, which contains mosaics and stone inlays, have impressed researchers.

Mahir Polat, Deputy Secretary-General of the Istanbul Metropolitan Municipality (IBB), stated that the structure is an excellent example of the city’s architecture that has withstood the test of time and the wrath of earthquakes.

“What is one of the most important aspects of this discovery of a 1,500-year-old passage? Dozens of tremors have passed in these 1,500 years in Istanbul, which is currently struggling with earthquake risk. This structure has managed to survive all these earthquakes. Türkiye should learn the secret and have knowledge of this,” Polat explained.

The 1,500-year-old underground tunnels discovered in Istanbul, Türkiye. Photo: DHA Photo
The 1,500-year-old underground tunnels discovered in Istanbul, Türkiye. Photo: DHA Photo

Polat pointed out that the main structure of St. Polyeuktos was destroyed, but its infrastructure remains intact. “The earthquake memory of the city is also here. If you want to see Istanbul’s earthquake memory, what happened in the Fatih district is a good example,” he added.

Reminding that civil engineers and scientific consultants who specialize in earthquakes also assisted in the municipality’s excavation works, Polat stated that the experts would also share a report documenting the earthquakes the area witnessed in the past.

“The mortar with a mixture known as Horasan mortar from the period. We know it is important in terms of the technology of that period. We also examined the surface samples of the structure, such as stone, plaster, and possible gypsum, in the laboratory to determine their composition and archaeometry,” Polat added.

During the excavation works in the area, apart from the statue, the teams also found 681 bronze coins, stamped bricks, marble pieces, ceramics, oil lamps, glass, and metal artifacts.

Related Articles

Maya city Tikal put today’s urban gardens to shame

26 June 2021

26 June 2021

The Maya civilization was known for its achievements in art, architecture, mathematics, astronomy, and calendar systems. Tikal, the ancient Maya...

A Rare Ancient Saber Discovered in Kyrgyzstan

5 August 2023

5 August 2023

An ancient saber (heavy military sword with a long cutting edge and, often, a curved blade) was found by three...

Scientists have developed a new tool that enables them to identify prehistoric and historic individuals’ relatives up to the sixth-degree

24 December 2023

24 December 2023

A new method of genetic analysis makes it possible to determine family relationships of prehistoric and historical individuals up to...

A former Spanish disco-pub confirmed as lost medieval Synagogue

11 February 2023

11 February 2023

In the Andalucian city of Utrera, archaeologists have uncovered the remains of a 14th-century synagogue. The discovery, made public on...

A cemetery belonging to 54 children was found during the excavation in the old quarry in Diyarbakır, Türkiye

4 January 2024

4 January 2024

During the archaeological excavation carried out in the area considered to be an old quarry in the Kulp district of...

Fossil found at the edge of the Tibetan Plateau reveals an owl active during the day 6 million years ago

29 March 2022

29 March 2022

The incredibly well-preserved fossil skeleton of an extinct owl that lived was discovered on the edge of the Tibetan Plateau,...

Archaeologists discovered the earliest Iron Age house in Athens and Attica

26 May 2023

26 May 2023

A research team from the University of Göttingen discovered the earliest  Iron Age house in Athens and Attica. Archaeologists from...

When the waters receded, the mounds of Pulur Sakyol and Yeniköy, bearing the traces of Kura-Aras Culture, came to light

8 December 2021

8 December 2021

The important cultural areas of Pulur Sakyol and Yeniköy mounds, which bear the traces of Kura-Aras Culture, represented by kurgans...

12,000-Year-Old Grid-Plan Structures and Water Channel Discovered at Çayönü Mound

29 July 2025

29 July 2025

New Neolithic-era discoveries at Çayönü in southeastern Türkiye, dating back to approximately 10,200–6,500 BCE, include four grid-plan buildings and a...

Brief history and 9 unknowns of Hagia Sophia

11 August 2021

11 August 2021

The Great Church was the name given to Hagia Sophia when it was initially constructed (Megale Ekklesia). However, the Church...

Discovery Shedding Light on Ancient Maritime Trade: 1,500-Year-Old Trade Shipwreck Found off Türkiye’s Ayvalık

21 December 2024

21 December 2024

‘Turkish Sunken-Ships Project: Blue Heritage’, a 1500-year-old trade shipwreck was found off the coast of Ayvalık district of Balıkesir. Under...

A unique find in the Middle Don: Scythian gods on a silver plate

19 November 2021

19 November 2021

Archaeologists of the Archaeological Institute of the Russian Academy of Sciences, during their excavations at the Devitsa V cemetery in...

2000-year-old passage found after Latrina at Smyrna Theater

28 January 2022

28 January 2022

Archaeologists discovered a 2,000-year-old passage that was 26 meters long and constructed in an “L” form in the theater part...

Excavations in Poland uncover Goth graves filled with ornate jewellery

17 August 2023

17 August 2023

A 2,000-year-old Goth burial site filled with ancient jewels has been discovered in Wda Landscape Park (Wdecki Park Krajobrazowy) near...

Neanderthals too may have Developed a System of Numerical Notation

2 June 2021

2 June 2021

People developed numbers tens of thousands of years ago, according to archeological findings. Scholars are now investigating the first comprehensive...