Grafika od Pana Andrieja Stiepanienki. Źródło: https://chispa1707.livejournal.com/3433559.html
XVth century miniature of an ox-powered paddle wheel boat from the 4th century Roman military treatise De Rebus Bellicis by Anonymous. Original document held at Bodleian Library, Oxford.
A 15th century paddle-wheel boat whose paddles are turned by single-throw crankshafts. Source: so-called „Anonymous of the Hussite Wars”