1. Sketch the Outline
Draw two diagonal lines for the front of the building as shown. Connect them with two vertical lines. In the bottom center, draw another diagonal line that intersects with the bottom line. Add two more intersecting lines as shown. Sketch four lines from the left side of the front of the building to show the side of the building.
Add an odd-shaped U figure to the top of the structure. Top that with another U-shaped figure. Draw another curved line over that, connecting it with short vertical lines to the figure below. Top the dome with a half-circle.