An Italian company, HAL9000, claims to have created the world's largest digital image measuring 8.6 gigapixels.
The image is of a fresco painted by Gaudenzio Ferrari known as the Vito di Cristo in 1513 which depicts the life of Jesus Christ in 21 pictures. The original fresco measured over 750 square feet.
While the technological achievement is incredible, I am left completely humbled by the attention to detail paid by the artist. Everywhere you zoom, you see something that amazes.