Introduction to the Gate of the Sun: The Gate of the Sun was built in the 13th century and has a typical Arab style - tall, majestic and straight. It is one of the most praised gates in the ancient city. . There are two explanations for why it is called the Sun Gate: one is that there are patterns of the sun and the moon on the door; the other is that it is called the star measurement results of the era of Alfonso X. This door is located at the zero degree of the meridian. The sun always shines on this door.