1861-74: California State Capitol - construction or not?

The California State Capitol is located in Sacramento. The Neoclassical structure was completed between 1861 and 1874 at the west end of Capitol Park, which is framed by L Street to the north, N Street to the south, 10th Street to the west, and 15th Street to the east.
I had no plans on touching this structure, but as it often happens, I could not help it. Tell me if you see anything wrong with the below "construction" photograph. The photo was obtained here, and the contributing institution is listed as the California State Library.

Why do you think we have issues like this?

Title: California Capitol, construction

While looking for the original of the above photograph, this YT video popped up. Pretty sure you will like the vid. Enjoy.

What do you think was in the sky?


And here is two more of this guy's videos pertaining to this building.