In the left nave of the great abbey, a monosylvan canoe is proudly displayed, that is, dug out of a single oak trunk (Turkey oak), found in 1987 in the muddy bed of the Adda. It is a linter (from the Latin linter, lintris = vessel, small boat), a type of river vessel typical of the Po Valley, used for towed transport from the shore or for connections, for unloading goods, between the bank and the larger boats that were stationed in the middle of the waterway. Widespread between the 2nd century BC and the 11th century AD, lintres disappeared in the late Middle Ages due to the rarefaction of the large acorn-bearing oaks that characterized the local habitat. But if the Turkey oaks that dominated this floodplain area of the Adda unchallenged for millennia have almost completely disappeared, their memory has remained imprinted in the name of the towns; Abbadia Cerreto, precisely, and Casaletto Ceredano (that is, rich in Turkey oaks).