10 countries with the oldest public buildings still in use

For thousands of years, civilisations across the world have erected structures that defined their beliefs, governance and daily life. While many ancient buildings have fallen to time, war, and natural disasters, a few remarkable ones have survived l and are still in use today. 

From temples and theatres to dams and lighthouses, these historic structures continue to serve religious, civic or functional purposes, standing as enduring symbols of human ingenuity and cultural continuity.

Here are 10 of the world’s oldest public buildings that remain in use:

Pyramid of Djoser – Saqqara, Egypt

Designed by the renowned architect Imhotep, the Step Pyramid of Djoser is considered the first large-scale stone structure in history. Built as the burial complex for Pharaoh Djoser around the 27th century BC, it laid the foundation for pyramid construction in ancient Egypt. Though no longer used as a royal tomb, it remains an active heritage and tourist site.

Mausoleum of the First Qin Emperor – Xi’an, China

Famous for housing the Terracotta Army, this vast mausoleum complex reflects the ambition and advanced engineering of ancient China. While the emperor’s main tomb remains largely unexcavated, the site continues to function as a protected public heritage location and major tourist attraction

Great Pyramid of Giza – Giza, Egypt

Built for Pharaoh Khufu, the Great Pyramid stood as the tallest man-made structure in the world for nearly 3,800 years. Its precise alignment and durable construction continue to fascinate historians and engineers. Today, it remains open to visitors, preserving its historical and cultural significance as a landmark.

Hagia Sophia – Istanbul, Turkey

Originally constructed as a Byzantine cathedral in AD 537, Hagia Sophia has served as a church, a mosque, and a museum, and has been used as a mosque again. Despite earthquakes, invasions, and political changes, the iconic structure remains in active religious use, making it one of the most historically layered buildings in the world.

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Ziggurat of Ur – Southern Iraq

Built by the Sumerians, the Ziggurat of Ur served as a religious and civic centre in one of the world’s earliest urban societies. Made from sun-dried bricks and reinforced with fired brick, it has survived harsh desert conditions and continues to attract scholars and tourists.

Tower of Hercules – A Coruña, Spain

Recognised as the oldest operational lighthouse in the world, the Tower of Hercules has guided ships along Spain’s northern coast for nearly 2,000 years. Built by the Romans, it remains fully functional today and is listed as a UNESCO World Heritage Site.

Proserpina Dam – Mérida, Spain

Constructed by Roman engineers to supply water to the ancient city of Augusta Emerita, the Proserpina Dam is still in use for irrigation. Its enduring soil-and-brick construction highlights the durability and practicality of Roman engineering

Theatre of Epidaurus – Epidavros, Greece

Celebrated for its exceptional acoustics, the Theatre of Epidaurus was built in the 4th century BC and continues to host performances. Its design, set into a natural hillside, showcases the sophistication of ancient Greek architecture.

Mundeshwari Temple – Kaura, India

Believed to be the oldest continuously functioning Hindu temple in the world, Mundeshwari Temple has been a place of worship for nearly 2,000 years. Its octagonal stone structure remains a vital religious centre despite centuries of restoration.

Pantheon – Rome, Italy

Originally built as a Roman temple, the Pantheon was later converted into a Christian church, ensuring its continuous use for nearly two millennia. Its massive concrete dome and central oculus remain architectural marvels that influence modern design.