Today, we went to the UNO City of Vienna and saw the Headquarters of the IAEA (International Atomic Energy Agency). There, were learned how this UN facility isn't technically in the country of Austria, but rather it is UN territory, and if there's an emergency, it is not the Austrian police that will respond, but rather, the UN police that will.
It is at the IAEA where decisions and regulations concerning nuclear/atomic energy are made so that they won't blow up the planet, but can instead provide alternative sources of energy (as long as it doesn't result in another Chernobyl).
After our excursion at the UN, I attended mass at the Augustinkirche, an Augustinian church located at the Hofburg. There, I listened to some god-tier (pun-intended) choir music and organ music, and some free Mozart.
After, I accessed a chapel that is normally not accessible and ate food right next to a giant sarcophagus containing Habsburg hearts.