The grounds of the imperial palace were quite extensive, to the point of occupying several blocks. The castle itself was enormous, by far the largest building in the city and there are many large mansions here.
It was obvious because the imperial family had to show its status. The castle was similar to any western castle on Earth in ancient times, except it had flashes of color in some parts.
Castles on Earth were usually gray or white depending on the material they were made from, but this one had some parts painted blue, red, and golden, even though it was mostly white.
It was magnificent, but Andrew did not have the opportunity to detail it well, as he was very close and could not see its full extent. Furthermore, with all the guards present, it would only cause problems for Andrew to look in too much detail at the castle.