The State Hall is a single room almost eighty metres long and twenty metres high, lined floor to gallery with walnut bookcases, and about two hundred thousand books stand in them. Every one was printed between 1501 and 1850, and nobody reads them here — the hall is a museum, and the books stay where they were shelved. Halfway along, an oval dome opens to thirty metres, and under it Daniel Gran's fresco carries the emperor Charles VI into the sky.
Fifteen thousand of the books were Prince Eugene of Savoy's, the emperor's leading general; the court bought his library the year after he died, and his coloured bindings still stand together. Charles VI ordered the hall in 1722 and had it raised over an old covered riding school. Johann Bernhard Fischer von Erlach designed it, his son finished the shell in 1726, and the books moved in four years later. Sixteen Habsburgs stand in marble around the middle of the floor, with four Venetian globes over a metre across among them.