JOHANN, Elector of Saxony (1468-1532, 'John the Steadfast'). Autograph letter signed ('Hanß Herczog zu Sachssen') to a princely relative [perhaps Duke Heinrich of Brunswick-Lüneburg], Weida, 'am mitwochen nach quasimodogeniti' [18 April] 1515, discussing a joint visit to the spa at Warmbad, whither he will be setting off in a fortnight, 'die weyll es deynne gelegenhayt nit yst auff die zceyt zu myr zu komen so wyll ich vorschaffen das etliche reutter auff dich wartten sollen zu Sleytz die auch mit dyr reytten sollen bis zy myr yns warm bat', one page, folio, integral address panel (light browning). Provenance: Stargardt sale, 23/24 March 2004, lot 1362; the Albin Schram Collection. Johann continued the policy of his brother and predecessor, Frederick III the Wise, in protecting the Protestant Reformation, and in 1527 legally established the Lutheran church in his territories.