Wikipedia, at the link above, says:

"Francis II, Holy Roman Emperor (German language: Franz II, Heiliger Römischer Kaiser) also referred to as Francis I, Emperor of Austria (February 12, 1768 – March 2, 1835) was the last Holy Roman Emperor, ruling from 1792 until August 6, 1806, when the Empire was disbanded. He then became Francis I, first Emperor of Austria (ruling from 1804 to 1835).

"He was a son of Leopold II of Austria (1747 – 1792) and his wife Maria Luisa of Spain (1745 – 1792)."

He had a number of children (by 4 wives), one of whom was Franz Karl (1802-1878) , whose son became Emperor Franz Joseph I of Austria. The "son" – whom I haven't looked up, possibly was born ca. 1830?

I can't be sure from the pictures posted, but it could say "Emper." rather than Fuhrer? The date "1808" looks quite clear, but then ...

The possibility that this was an engraving made from a photograph can't be ruled out. Daguerreotypes of this clarity and tonal range(?) were made ca. 1839, and other processes with better speed followed quickly, esp. up to the time when construction of the Staatsoper occured. Louis Daguerre's "The Louvre from the Left Bank of the Seine" from 1839 is well known and shows comparable detail.

The problem with it being from a photo is that long exposures required by the early processes might have blurred people and animals; but it was apparently common enough to transfer the buildings and scenery more or less mechanically, omitting the blurs, and add the moving stuff "artistically" during the creation of the etching plates.

Of course artists skilled enough to have done the original image in question in pen and ink are well enough known too. It's just a matter of "which one?".

John