The Treasury Museum Khonkaen by Plan Architect – Revitalizing Modern Heritage in Thailand

From Bank Headquarters to Cultural Landmark

Once serving as the Bank of Thailand Northeastern Region Office, the building in central Khonkaen stood as a testament to Thailand’s modernist architectural era. Located amid schools, markets, residential zones, and community spaces, its defining features—waffle slab roofing, cantilevered floors, and a visible modular grid—set it apart as a distinctive civic landmark.

After the Bank relocated, the site was reimagined as The Treasury Museum Khonkaen, a vibrant cultural and public hub. The adaptive reuse project transforms the once-closed financial institution into an inclusive museum complex featuring exhibition galleries, a multi-purpose pavilion, public park, and administrative spaces—designed to serve the city’s evolving cultural needs.

Preserving Modernist Identity with New Functions

The renovation balances heritage preservation with functional upgrades. Key modern-era design elements were retained, while spatial configurations were adapted for public use:

First Floor Transformation: Opaque security walls were removed to invite natural light, improving visibility between the common areas, library, and outdoor gardens. This change redefines the ground level as an open, welcoming social zone.
Second Floor Adaptation: The former central roof garden was transformed into a double-volume exhibition hall under a newly designed roof that channels indirect daylight while connecting vertically to the first floor.
Historic Material Reuse: Original steel bars and curved steel components, once part of the bank’s security infrastructure, were creatively integrated into the main hall, lift shaft coverings, and even as ceiling details in the office area—reinforcing the narrative of transformation.

Gallery & Café – A New Social Magnet

The former staff residence was repurposed into a two-level cultural space—with a café on the ground floor and gallery space above. Exposed structural elements celebrate the building’s original charm, while vertical fins pay homage to the original architect’s intention of achieving a “floating” visual effect.

Public Park & Multi-Purpose Pavilion

A striking cantilever-roof pavilion now anchors the site’s new public park, replacing what was once a car park. The landscape design draws inspiration from the local ‘Pha-Khao-Mah’ weaving tradition—its colorful grids and patterns translated into dynamic outdoor spaces. This weaving motif symbolizes the interconnection of people, culture, and architecture, encouraging community engagement through lively, interactive spaces.

Urban Renewal with Cultural Resonance

The Treasury Museum Khonkaen is more than an adaptive reuse project—it’s a civic revival, merging the modernist architectural heritage of Thailand with local cultural identity. By weaving together history, design, and community activity, the project not only preserves the city’s architectural memory but also injects it with new energy, making it a valuable asset for Khonkaen’s cultural future.