Hi Kyle,

Thank you for contacting Mearto with your appraisal inquiry.
Latin medieval music, spanning roughly from the 5th to the 15th centuries, played a central role in the Christian church and was primarily liturgical. Gregorian chant, a form of plainchant, was the dominant style, characterized by monophonic melodies sung in Latin. Music was notated in neumes, the early form of musical notation. Sacred music thrived in cathedrals and monasteries, while secular music, including troubadour songs, began to emerge during the later medieval period.
Medieval music manuscripts are not very rare - in the past 9 months alone, nearly a dozen of them have been sold on just the LiveAuctioneers platform, bringing prices ranging from $10 to $140. With modest supply and limited demand, prices remain modest for all but the most elaborate examples, or ones with important history of ownership. Unless there's considerable history to these, the pair is worth $50-75.
Based on the photos and information provided, and subject to examination, this is:

Two framed Latin music sheets
European, probably 16th or 17th Century
ink and color on paper or vellum
framed, each 21 by 13 inches
CONDITION: Framed, with edge losses and some staining throughout.
PROVENANCE: Inherited
$50-75 for the two together*
*represents a fair-market value for auction purposes; retail or asking price may vary.

Please let us know if you have additional items to appraise, or questions/concerns, and thank you again for using Mearto.
~ Delia