Credit: Kroton
Walls of the elliptical inner courtyard of the imposing fortified palace of Krzyżtopór in Ujazd, south-eastern Poland. Constructed by Krzysztof Ossoliński in 1644, the Baroque palace boasted such modern amenities as dumbwaiters, running water, heating and ventilation systems, and possibly even a ceiling aquarium with exotic fish, but suffered extensive damage during the Swedish occupation in 1655 and was ultimately reduced to ruin by the Russians in 1770.