AUSTRIA

Here we have the Republic of Austria, a country in central Europe, which was once the centre of the austro-hungarian empire until world war one. it is now a member of the European union and of the "Euro-zone". Its banknotes were in schillings until 2002 and then Euros since

so if we start at the top the first two pics are of the front and back of a one Krone note from 1919 (as its got a green overprint on the note similar to the 1916 one) this is probably the first issue after the WW1 has finished.

Pic 3 is from 1984 100 schilling note with Eugen Bohm V Bawerk, an Austrian economist, the reverse is wissenschaften academy  Pic 4, from 1986 50 schillings, with Sigmund Freud on the front and Vienna's Josephinum medical school on the reverse. Pic 5 is the 20 schilling note from 1986 with Moritz Daffinger and the Albertina Museum on the reverse.

Pic ^ is a slightly earlier issue from 1970. the 50 schilling note has a portrait of  Ferdinand Raimund , an Austrian actor and the Burg Theatre, Europe's second oldest theatre,  on the reverse.

And finally, the last two pics are front and back of a 20 Kronen note and is  from 1907. i'm assuming that the kronen / korona is because it is from the austro-hungarian empire and that would be the two languages used ???? . I don't have much more info on this one but if someone has more please post it in the comments . TA.