Catholic Church. Gradual : manuscript, [ca. 1300].MS Typ 963Houghton Library, Harvard University
![Catholic Church. Gradual : manuscript, [ca. 1300].MS Typ 963Houghton Library, Harvard University](https://64.media.tumblr.com/7dcd518f0b0422051b31b6d4e319daad/tumblr_n8qbm4fL1g1s83h8do2_1280.jpg "Catholic Church. Gradual : manuscript, [ca. 1300].MS Typ 963Houghton Library, Harvard University")
![Catholic Church. Gradual : manuscript, [ca. 1300].MS Typ 963Houghton Library, Harvard University](https://64.media.tumblr.com/8aa6f5e487f2ecedce1f090ffe1bde70/tumblr_n8qbm4fL1g1s83h8do1_1280.jpg "Catholic Church. Gradual : manuscript, [ca. 1300].MS Typ 963Houghton Library, Harvard University")
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