You will want to linger a few minutes at the large open square in front of Museum of the Royal Houses. The pedestrian-only space is named Plaza Reloj de Sol. This means Sundial Plaza. When this sundial was created in 1753, it was the first Spanish-authorized timepiece in the New World. Reloj de Sol was installed during the co-governorship of Francisco Rubio Peñaranda. It provided the official time for the local government. After more than a quarter century, you can still rely on its accuracy.