6thC CE Ostracon from Deir el-Gizaz has a Coptic monk practicing the alphabet to write in ‘Bible Majuscule’ script. (P. L. Bat. 25.11, Image via the Papyrological Institute at Leiden University: https://www.fulcrum.org/concern/monographs/nk322d46v) I love this script! It was used on the Codex Vaticanus & Sinaiticus. 📖
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https://www.fulcrum.org/concern/monographs/nk322d46v And I wrote on these exercises here: https://sarahemilybond.com/2016/02/18/amo-amas-amat-greco-roman-school-exercises/