Located in the old town of Santiago, the Plaza de Armas is surrounded by Santiago's most important religious, political and cultural institutions and is one of the most important squares in the region. When Spain colonized South America, according to Spanish practice, a weapon plaza would be built in the flattest and widest part of every colonial capital. In the square, there would be a gallows, symbolizing the royal power. And usually, churches, royal courts, state treasury, city halls, prisons, and the residences of the dignitaries are built around the square. Nowadays, the important buildings in the square are still there, but the gallows symbolizing the right has disappeared. Over time, the Plaza of Arms has finally become one of the favorite squares for the locals. On the west side of the plaza is Chile's largest and most imposing main church in Santiago, and it is also Chile's most famous church, and the remains of the Archbishop of Chile are said to remain in the ground beneath the church. The corner of the north side of the square, a white ornate building caught my eye, here is the Central Post Office in San Diego. When you walk into it, you can send a beautiful postcard to yourself or your relatives and friends. When you receive a blessing from the South America, the other party will be very happy. On the other side of the square, painting booths are placed along the street. Everyone's painting skills are very amazing. If you have time, sit here and let these folk masters come to portraits, colorful and beautiful South American style. The style of painting is just like the city, and it is passionate.