Mark Twain International School opens Camp Costinesti By Mark Twain IS 15 July 200315 July 2003 Mark Twain International School opens Camp Costinesti, its first dedicated school camp on the Black Sea shore, which hosts both summer camps and entertaining trips every year, as well as professional seminars and workshops for the MTIS faculty. Previous Mark Twain International School becomes the twin school of an IB World School, Rheintal International School 15 March 2009 Next Mark Twain IS 15th Anniversary 1 June 2010
