Lustratio

Lustratio is a big word that means a ceremonial cleansing or purifying. It's like when you take a bath to clean your body, but for a whole group of people or even a whole city! In ancient times, people believed that certain things like bad luck or evil spirits could stick around and make things not go so well. So, they would have special ceremonies where they would use water, fire, and other things to make everything all better.

For example, in ancient Rome, they had a ceremony called lustratio where they would take water from a sacred spring and sprinkle it on people and buildings to get rid of any bad luck or bad energy that might be hanging around. It was like a big spiritual house cleaning! Nowadays, some religions still have ceremonies like lustratio to purify their places of worship or even their own bodies and minds.