619
I looked all over for a date and got everything from "early 1800s" to "late 1800s" but nothing exact, so I had to make an educated guess. The first cameras practical enough to take such a photo were developed around 1840 and the excavations began in 1867.
I thought it was a scifi spaceship at first
Por que no los dos?
It is based on Goa'uld technology...
It's too small for a spaceship but it does have 40k spaceship vibes.