Rosemont, Illnois At Rosemont Horizon Arena
undertaker
YES but it will be an inside arena
Yes, there are multiple; Legends of Wrestlemania, WWF WrestleMania: The Arcade Game, Road to Wrestlemania, Road to Wrestlemania X8, Super WrestleMania, WWF WrestleMania 2000, WWE WrestleMania X8, WWE Wrestlemania XIX, WWF WrestleMania, and WWE WrestleMania 21.
After he beated Triple H, there are 19.1991 WrestleMania VII: Jimmy Snuka1992 WrestleMania VIII: Jake Roberts1993 WrestleMania IX: Giant González1995 WrestleMania XI: King Kong Bundy1996 WrestleMania XII: Diesel1997 WrestleMania XIII: Sycho Sid1998 WrestleMania XIV: Kane1999 WrestleMania XV: The Big Boss Man2001 WrestleMania XVII: Triple H2002 WrestleMania XVIII: Ric Flair2003 WrestleMania XIX: The Big Show and A-Train2004 WrestleMania XX: Kane2005 WrestleMania XXI: Randy Orton2006 WrestleMania XXII: Mark Henry2007 WrestleMania XXIII: Batista2008 WrestleMania XXIV: Edge2009 WrestleMania XXV: Shawn Michaels2010 WrestleMania XXVI: Shawn Michaels2011 WrestleMania XXVII: Triple H
WrestleMania - 1985WrestleMania 2 - 1986WrestleMania III - 1987WrestleMania IV - 1988WrestleMania V - 1989WrestleMania VI - 1990WrestleMania VII - 1991WrestleMania VIII - 1992WrestleMania IX - 1993WrestleMania X - 1994WrestleMania XI - 1995WrestleMania XII - 1996WrestleMania 13 - 1997WrestleMania XIV - 1998WrestleMania XV - 1999WrestleMania 2000 - 2000WrestleMania X-Seven - 2001WrestleMania X8 - 2002WrestleMania XIX - 2003WrestleMania XX - 2004WrestleMania 21/WrestleMania Goes Hollywood - 2005WrestleMania 22 - 2006WrestleMania 23 - 2007WrestleMania XXIV -2008The 25th Anniversary of WrestleMania/WrestleMania XXV/WrestleMania 25/ WrestleMania's 25th Anniversary - 2009WrestleMania XXVI - 2010WrestleMania XXVII - 2011WrestleMania XXVIII - 2012WrestleMania XXIX - 2013WrestleMania XXX/ WrestleMania III0 - 2014
Wrestlemania 26
Wrestlemania 20: The Big Show Wrestlemania 21:John Bradshaw Layfield Wrestlemania 22:Triple H Wrestlemania 23:Shawn Michaels Wrestlemania 24:Randy Orton and Triple H Wrestlemania 25:Edge and The Big Show Wrestlemania 26:Batista
Currently Undertaker is 19-0 WrestleMania VII: Jimmy (Superfly) Snuka WrestleMania VIII: Jake "The Snake" Roberts WrestleMania IX: Giant Gonzales WrestleMania XI: King Kong Bundy WrestleMania XXI: Diesel WrestleMania 13: Sycho Sid WrestleMania XIV: Kane WrestleMania XV: The Big Boss Man WrestleMania X-Seven: Triple H WrestleMania X-8: Ric Flair WrestleMania XIX: Big Show & A-train (Handicap match) WrestleMania XX: Kane WrestleMania 21: Randy Orton WrestleMania 22: Mark Henry WrestleMania 23: Batista WrestleMania 24: Edge WrestleMania 25: Shawn Michaels WrestleMania 26: Shawn Michaels WrestleMania 27: Triple H
Most likely, Wrestlemania 30 will be held in Madison Square Garden considering every 10 years it's held there. For Example: Wrestlemania, Wrestlemania X, and Wrestlemania XX.
Yes
WrestleMania 23.
The sponsor of Wrestlemania 25 was the The Army National Guard, and during Wrestlemania 25 it celebrated its twenty-fifth time supporting Wrestlemania.