Question: What is this region highly contested between Poland and Lithuania called in Polish where Lithuanian Education Society Rytas is located? 

Lithuania Minor (Lithuanian: "Mažoji Lietuva" ; German: "Kleinlitauen" ; Polish: "Litwa Mniejsza" ; Russian: Máлая Литвá ) or Prussian Lithuania (Lithuanian: "Prūsų Lietuva" ; German: "Preußisch-Litauen" , Polish: "Litwa Pruska" ) is a historical ethnographic region of Prussia, later East Prussia in Germany, where Prussian Lithuanians or Lietuvininkai lived.  Lithuania Minor enclosed the northern part of this province and got its name due to the territory's substantial Lithuanian-speaking population.  Prior to the invasion of the Teutonic Knights in the 13th century, the main part of the territory later known as Lithuania Minor was inhabited by the tribes of Skalvians and Nadruvians.  The land became depopulated to some extent during the warfare between Lithuania and the Order.  The war ended with the Treaty of Melno and the land was resettled by Lithuanian newcomers, returning refugees, and the remaining indigenous Baltic peoples; the term Lithuania Minor appeared for the first time between 1517 and 1526.  With the exception of the Klaipėda Region, which became a mandated territory of the League of Nations in 1920 by the Treaty of Versailles and was annexed to Lithuania from 1923 to 1939, the area was part of Prussia until 1945.  Today a small portion of Lithuania Minor is within the borders of modern Lithuania and Poland while most of the territory is part of the Kaliningrad Oblast of Russia. <SEP>  Established in 1913, the society maintained some 100 primary schools (mostly one-room schools), 50 evening classes, and Teacher's Seminary in Vilnius (Wilno, Vilna) in 1927.  Due to political tensions between Poland and Lithuania as well as wider Polonization policies, Rytas faced increasing difficulties and restrictions in maintaining its schools.  Similar situation existed with Polish schools in Lithuania (see Lithuanization).  The situation continued to worsen as both sides increased restrictions in retribution.  As schools were closed, Rytas shifted its focus to maintaining community reading rooms. The Lithuanian Education Society Rytas (Lithuanian: "Lietuvių švietimo draugija „Rytas“" ; "rytas" means "morning" or "dawn") was a Roman Catholic society fostering education in the Lithuanian language mostly in the Vilnius Region, then fiercely contested between Lithuania and the Second Polish Republic, now split between Lithuanian and Belarus.  After the death of Józef Piłsudski in 1935, the rooms were often raided by police and closed.  Eventually, the society was abolished by Polish authorities in February 1938.  Only the Vytautas the Great Gymnasium was allowed to operate.  After the Polish ultimatum of March 1938, diplomatic relations were established between Poland and Lithuania and Rytas was allowed to operate again in May 1939.  It could not resume its activities due to World War II and was abolished again soon after the occupation of Lithuania by the Soviet Union in June 1940.  The society, with the same mission of promoting Lithuanian-language education, was reestablished in 2004. <SEP> The 1938 Polish ultimatum to Lithuania was an ultimatum delivered to Lithuania by Poland on March 17, 1938.  The Lithuanian government had steadfastly refused to have any diplomatic relations with Poland after 1920, protesting the annexation of the Vilnius Region by Poland.  As pre-World War II tensions in Europe intensified, Poland perceived the need to secure its northern borders.  The establishment of diplomatic relations would mean a "de facto" renunciation of Lithuanian claims to the region containing its historic capital, Vilnius (known in Polish as Wilno).  Five days earlier, Poland, feeling supported by international recognition of the annexation of Austria by Nazi Germany, decided to deliver an ultimatum to Lithuania.  The ultimatum demanded that the Lithuanian government unconditionally agree to establish diplomatic relations with Warsaw within 48 hours, and that the terms be finalized before March 31. <SEP> Valia College is an education institute, established in 1961, run by Cosmopolitan Education Society located at D.N. Nagar, in Andheri West, Mumbai.  The college is affiliataed with University of Mumbai and accredited by NAAC.  In 1961, it was the spirit of idealism that inspired a group of like minded residents of D. N. Nagar, Andheri (W) to establish a quality educational institution.  Thus, was the Cosmopolitan Education Society was born.  Under its Aegis, the society runs the Valia College of Commerce and Arts which offers various programmes at undergraduate and post-graduate levels.