The , by Felice Feliciano, published in 1463, is a text that covers how to create Roman square capital letters geometrically based on the subdivision of a square.
The codex, probably printed in Verona, is the first humanistic treatise on the construction of Roman capital letters. It contains a complete Roman alphabet, two letters on each sheet, below which the rules for their design are given. The final part includes a recipe for colors. The original is hand-colored with text both in Italian and Latin with an epigram by Paolo Ramusio published in 1463 in Volume Codex Vaticanus Latinus 6852.[1] The original is preserved in the Vatican Apostolic Library.[2]