 Stadtmüller founded the Albanian Institute in Munich, Germany, in 1963.Stadtmüller is the author of hypothesis that Mat valley was summer pasturage for early Albanians.According to this hypothesis Albanian language does not have loan words for flora and fauna found above 900m because this valley is situated in more than 1,000 m altitude and surrounded by mountains, admitting that flora and fauna found in lower ranges have loanwords originating in Slavic languages.