Complete detailed Landscape drawing

This is a drawing of the outside of the National Media Museum and it took around two hours and 45 minutes to complete.
Due to the amount of curved lines and the lack of sqere-like buildings, it is hard to say wether perspective is correct or not. Yet, the curve in the windowed part of the NMM front proves that the building goes further away from the viewer in its left parts. This means that the taller part on the right and the shorter part on the left of the museum do not break the rules of perspective. There are also a few horizontal lines (the top and bottom outlines of the NMM mostly) that show perspective going to the right. Because of the uncommon bending of the building, the top line and the window line may give the impression of false distortion, but the shading is slightly exaggerated, aiming to show the curvature of the wall better.
The composition isn't perfect, mostly because of the way the image seems to be cut on the right and on the bottom. Yet, there is success in placing the top lines near the rule-of-thirds line. Also, the entrance to the building, the deepest point in the drawing, is close to the rule-of-thirds intersection point.
The focal point of the drawing is clearly the entrance to the building. It is emphasized with strong implied lines formed by the rooftops and the road coming from the foreground. Both of the lines lead the eye to the entrance. Being a mid-ground element makes the entrance of teh building an even stronger focal point.
In terms of shading, the image doesn't look as dramatic as all the curvature and windows in the building would have allowed. Light is coming from the right, so most of the drawing shows shadowed areas resulting in most of the shading being due to tightness between elements (the end of the glass part of the building in the middle of the drawing). There are a few areas showing an interesting light-shadow contrast, but they are small and just a few (shadows from the signs next to the road in the foreground, the top-left edge of the NMM's entrance, the building right behind and over the entrance, the small wall between the stairs and the road leading to the entrance).