Alexander Vygantas was the duke of which city in Lithuania?
Kernavė Kernavė was a medieval capital of the Grand Duchy of Lithuania and today is a tourist attraction and an archeological site (population 318, 1999). It is located in the Širvintos district municipality located in southeast Lithuania. A Lithuanian state cultural reserve was established in Kernavė in 1989. In 2004 Kernavė Archaeological Site was included into UNESCO world heritage list.
Friedeburgh Friedeburgh or Friedeburg was a short-lived castle of the Teutonic Order in Samogitia (exact location is unknown). It was built after the Treaty of Salynas was signed in 1398 and Samogitia was granted to the Knights by Vytautas, Grand Duke of Lithuania. The castle was to become administrative center of Samogitia.