13
/
en
AIzaSyCYaC8UkdPkQKLFUmpasLV5eC3M802CrcA
91552
7693
2

dec 15, 1040 - 1040 CE Guido d’Arezzo started using five line notation

Added to timeline:

10 months ago
0
0
251
nolan
Timeline #1

Date:

dec 15, 1040
Now
~ 978 years ago
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