Need feedback on corner shelf idea

My son is a big Lego fan and has built some of the bigger pieces. The issue is how to display them? The latest on is the 7020 pc, Hogwarts Castle. It measures over 22” (58cm) high, 27” (69cm) wide and 16” (43cm) deep.

As you can imagine this is way too big for our small home to be displayed anywhere but up. So my idea is a corner shelf deep enough to hold it but a 27 inch wide and 16-inch deep shelf may not be the best idea.

Any advice on the corner shelf idea or another suggestion would be appreciated