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Literatur:
K. Drake. Die Burg Hämeenllinna im Mittelalter. SMYA 68. Helsinki 1968.
K. Drake. Die Bauherren der Burg Hämeenlinna in Mittelalter. Castella Maris Baltici III-IV. AMAF V. 2001.
K. Uotila Medieval Outer Baileys in Finland. With Special Reference to Turku Castle. AMAF III. 1998.