https://youtu.be/qggvdb8_xB8
https://youtu.be/4q6DOLGBiaw
1966 - The Metropolitan Opera House, in New York City, opens for the first time.
https://www.youtube.com/watch?v=BbLZJh2atzU
https://youtu.be/UI9IVEJbvNc
https://youtu.be/JdypgvhrAws
https://youtu.be/4kqSoOVet18
https://youtu.be/h31YhV25tbQ
https://youtu.be/qUh0jcGqZlM
1584 - San Lorenzo del Escorial Palace in Madrid is completed.