An artwork that consists of a re-created bedroom with videos projected onto the walls would best be described as

An artwork that consists of a re-created bedroom with videos projected onto the walls would best be described as an installation.
This type of art is often used to alter our perception of space by transforming it into something out of the ordinary. It usually entails the usage of various types of constructions, placed around a space to create an artistic sense of reality and fantasy.

The gregorian chant was a major cultural milestone in the middle ages. it was one of the first codified forms of music meant to be played as written, where previously it was difficult to mass-produce and disseminate any music. what's more, these chants were also some of the first examples of musical notation: the notes and bars of today's music sheets are a reflection of centuries of evolution beginning with these chants. it became official throughout the entirety of the catholic church, meaning that nearly all of europe followed this musical notation and styling.

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