The Ecbasis captivi (full title: Ecbasis cuiusdam captivi per tropologiam, "The escape of a certain captive, interpreted figuratively") is an anonymous Latin beast fable that probably dates to the middle of the 11th century, and was likely written in the Vosges region of France. It is the oldest example of a European beast fable to survive, and the first medieval European example of anthropomorphic animals. The poem is written in hexameters with Leonine internal rhyme frequently used throughout the poem. The text survives in two manuscripts, both of which now are at the Royal Library of Belgium.