Due to the supposed death of Gediminas during the attack on the first Bayernburg, debates over its location have received greater attention from historians. According to Johannes Voigt, the first Bayernburg stood on the Mastaičiai (Narkūnai) hillfort opposite of Skirsnemunė. In 1934, Kazys Paunksnis proposed that it stood in Pilaitės, located about west of Veliuona. This opinion was accepted by Zenonas Ivinskis and supported by Adolfas Tautavičius who conducted archaeological excavations in Pilaitės in 1965 and found many crusader artifacts. While this became the leading theory, other opinions exist. Edvardas Gudavičius and Alvydas Nikžentaitis identified it with Marienburg, built on the Romainiai island between Veliuona and Pieštvė and destroyed in 1336. Gintautas Zabiela strongly refuted the idea that Bayernburg stood in Pilaitės as it is too small for a large fortress that could house 200 soldiers and withstand 22 days of attack. Zabiela instead suggested Plokščiai (Vaiguviškiai) hillfort ().