Here's a couple of pictures I drew of the interior living room of the Farnsworth house designed by Meis Van der Rohe.  We were provided with pictures of the furniture in the room and the plan.  From these, we were to construct perspective drawings.  The first was to be done in pen and drafted on 8-1/2"x11" vellum while the second was done in pencil on plain drawing paper.  The assignment was fairly easy, but the grading was ultra critical, making the attention to detail very important.

Here's a picture of an elevation of the Farnsworth house with the plan of it below.

Again, the plan of the Farnsworth house.  However, this one displays the furniture and the point at which one is supposed to be standing with regards to the perspective drawing.

Here's a couple photos of the interior of the house.

Some detail pictures showing the fireplace, chairs and table in detail.

Drafted in pen and including the furniture and exterior elements.

Freehand in pencil.  This was more of a study drawing for the final one seen above.