Actually these sketches sparked in my mind when I noticed that Gondor, one of the great human kingdoms in Middle Earth, had a name similar to a real city named Gondar in Ethiopia. That’s almost certainly coincidence as I seriously doubt Tolkien was the kind of white guy who would allow African influences on one of his world’s “nobler” cultures, but the mental image of a Gondor with Ethiopian trappings was irresistible to me.
Someday I shall draw Minas Tirith, the capital of Gondor, using an Ethiopian influence. Before then here are some sketches of how I imagine this Gondor’s architecture would look like. The turret on the right side is obviously based on the castle at Gondar whereas the obelisk borrows from Axum and the rooftop at the bottom from Lalibela’s rock-cut churches.