When refugees come to Maria von Burgund, she says: "Wir schaffen das." In English this means "We can manage this!" or "We can do it!" or "We can do this!" This is a famous quote of German chancellor Angela Merkel during the refugee crisis in Europe.
Matthias Corvinus mentions to Kunigunde, trying to impress/frighten her, that his Voivodes impales Turks upon stakes. As viewers might suspect, he is indeed referring to Vlad Dracula, often called Vlad the Impaler, who was Corvinus' vassal.