treets and Gothic cathedrals.
In total, Anno: Build an Empire has more than a hundred different buildings that you can have access to. That said, in the beginning you just have to build the most basic ones, and only later the most advanced. As in any strategy game, to build this structures you need resources, which have to be earned putting your citizens to work.
Something that stands out about Anno: Build an Empire is that, in contrast to other strategy games for Android, it doesn't have a long tutorial that you have to go through. This way, you can start enjoying it as soon as you open the game.
Anno: Build an Empire is a pretty good strategy game. It remains loyal to the saga, but offers a new gameplay that has been adapted to the free-to-play model.