LONDON — In a remarkable display of engineering, a medieval church tower in the City of London has been suspended 45 feet above ground to make way for a massive new office development.

The tower of All Hallows Staining, a centuries-old landmark, now sits on stilts above a 60,000-square-foot excavation site at 50 Fenchurch Street. Engineers carefully removed more than 125,000 tonnes of earth beneath the structure, in what has been hailed as a “never-seen-before feat of engineering.”

A “bottoming out” ceremony was held on Tuesday to mark the milestone. Once construction of the project’s basement levels is complete, the historic tower will be returned to ground level and incorporated into a new green public space.

The broader development, scheduled for completion in 2028, will include a 36-storey office tower featuring ground-floor shops, 62,000 square meters of office space, a public roof garden, and a 360-degree public realm experience.

The project symbolizes London’s unique blend of historic preservation and modern innovation, uniting a medieval church tower with a cutting-edge urban development.