Niccolo Tartaglia's General Trattato di Numeri et Misure

Here is the title page of part I of the General Trattato di Numeri (General Treatise on Number and Measure) (1556) of Niccolo Tartaglia (1500-1557).  This is an extensive work on elementary mathematics that was popular in Italy for several decades after its publication.

From the Rare Book and Manuscript Collection at Columbia University.

Part of the Mathematical Treasures section of Loci: Convergence.