Communities Minister Gordon Lyons formally opened a dedicated archive facility for the Historic Environment Record of Northern Ireland at the former Belfast War Room in Mount Eden Park on Monday. The building, located within Belfast City Council's grounds, now serves as the primary storage location for records concerning more than 45,000 historic places across the region.

The collection encompasses archaeological sites, monuments, and structures from industrial, marine, and defence sectors. Materials stored include architectural drawings, maps, plans, documents, and hundreds of thousands of photographs covering every era of Northern Ireland's history.

The project highlights the potential for sustainable reuse of historic structures. Although the original design presented significant engineering challenges during redevelopment, its unique features have proved ideal for archival purposes.

Key characteristics include 1.5 metre-thick reinforced concrete walls, a windowless layout, and an intricate network of small internal rooms. These elements help maintain stable environmental conditions necessary for the long-term preservation of sensitive documents.

Constructed in the early 1950s, the Northern Ireland Regional War Room was one of only 13 purpose-built regional bunkers established throughout the United Kingdom during the Cold War era.

Originally designed to coordinate civil defence and government functions in the event of a nuclear strike, the structure is recognised as one of the finest preserved examples of its kind anywhere in the UK. It holds Grade B1 listed building status.

A Department for Communities archaeologist examined restored equipment at the site during the opening ceremony. The transformation demonstrates how Cold War infrastructure can be repurposed to protect cultural heritage.

The facility is expected to continue supporting research and conservation efforts regarding Northern Ireland's built environment for years to come.