51°49′37″N 4°58′27″E / 51.826944°N 4.974167°E
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The Blue Tower (Dutch: Kasteel de Blauwe Toren) was a castle with an imposing stone keep in Gorinchem, the Netherlands. It was a princely residence of Charles the Bold, Duke of Burgundy. The complex, which stood there between 1461 and 1578, gained an almost mythical status thanks in part to descriptions by the Gorinchem chronicler Abraham Kemp and the discovery of its foundations in 1983.
It was located at the southwestern side of the city center, at the level of the current Tolsteeg, Duivelsgracht, and Buiten de Waterpoort by the Merwede river.