For your research on writer's materials from prelims and bequests, the Literary Archives of the Austrian National Library are the right place and you are most welcome.
Due to an event, the State Hall will close at 6 p.m. on Thursday, October, 24, at 4 p.m. on Friday, November 1 and at 6 p.m. on Thursday, November 14.
The reading rooms at Heldenplatz will be closed on Saturday, 2 of November.