12th century Latin lied of unknown authorship from Tegernsee monastery:You are mine, I am yoursOf that you may be sureDeep within my heartYou’re safely locked awayBut I have lost the keyAnd there you’ll ever stay.Middle High German original:Dû bist mîn ich bin dîn.des solt dû gewis sîn.dû bist beslozzenin mînem herzen.verlorn ist das sluzzelîn.dû muost…