 Nyorera kupfuurira kweiyi ndima - Feudalism yakabata muFrance mukati mezana ramakore rechi 10 nerechi 11, uye Nantes yaiva chigaro chedunhu rakaumbwa muzana ramakore rechipfumbamwe. Kusvikira pakuvamba kwezana ramakore rechi13, yakanga iri nhau yechinetso chokutsiva icho chakaona guta richipfuura kazhinji kazhinji kubva kuDuke dzeBrittany kuenda kuCounts yeAnjou yeImba yePlantagenet. Muzana remakore rechi14, Brittany yakava nehondo yokutsivaiyo yakaguma nokuva chigaro choumambo cheimba yaMontfort pachigaro choumambo. VaMontfort, vachitsvaka rusununguko kubva mukutonga kwemadzimambo eFrance, vakasimbisa masangano eBreton. Vakasarudza Nantes, taundi guru reBrittany rine vagari vanopfuura 10 000, kuti rive nzvimbo yavo yokugara huru uye vakachiita musha wedare ravo, pfuma yavo uye chancery yavo. Kutengeswa kwezviteshi zvengarava, kwakanga kusingakoshi muMiddle Ages, kwakava basa guru reguta racho. Nantes yakatanga kutengeserana nedzimwe nyika, ichitengesa munyu kubva kuBourgneuf, waini, machira uye hemp kazhinji kuBritish Isles. Zana ramakore rechi 15 rinoonekwa serenguva yokutanga yendarama yeNantes. Kutonga kwaFrancis II kwakaona kuvandudzwa kwakawanda kuguta raida zvikuru kugadziriswa pashure pehondo dzokurambana uye nhevedzano yemadutu nemoto pakati pa 1387 na 1415. Zvivako zvizhinji zvakavakwa kana kuvakwazve kusanganisira kereke huru nenhare, uye Yunivhesiti yeNantes, yokutanga muBrittany, yakavambwa muna 1460. 