Barthélemy Théodore, Count de Theux de Meylandt (26 February 1794 – 21 August 1874) was a Belgian Roman Catholic politician who served as the prime minister of Belgium three times.

The count died in Heusden, in the Meylandt Castle on 21 August 1874 in Belgium.

He was the first Belgian Prime Minister to die in office.

When Barthélémy de Theux de Meylandt died on 21 August 1874 he was succeeded by Jules Malou, Minister of Finance.

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