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Alternate MystarasRamelin Mystara by Ignacio Ramos, current as of 10 July 2017.
Knightfall's Mystara, two versions of the main map for The World Unknown; and updated sundered Thyatis by Robert Blezard, from the Mystara Facebook group posted 30 November 2016.
Weird Mystaras by Miladoon, LoZompatore, Charles Wenzler Jr, Dartamian and Giampaolo Agosta from The Piazza posted 24 February 2015.
Dark Crystal Mystara by Robin, from 6inchnails posted 29 January 2015.
Arcania project by Peet from The Piazza posted 17 June 2014.
New/old setting with Karameikos from (Cook) Expert by combatmedic, from The Piazza posted 15 June 2014.
Anondson's Rearranged Known World by Eric Anondson, from The Piazza posted 26 May 2014.
Shattered Realms: Duchy of Greendale by Wodger, current as of 1 December 2013.
Known World modifications & musings by combatmedic, from The Piazza posted 5 April 2013.
Map of Mithgarthr by Odinist, from The Piazza posted 27 June 2012.
Modified map placing Mithgarthr by Odinist, from The Piazza posted 27 June 2012.
History of Mithgarthr by Odinist, from The Piazza posted 27 June 2012.