Divina Proportione is based from the original studies from Luca Pacioli. Luca Pacioli was born in 1446 or 1447 in Sansepolcro (Tuscany) where he received an abbaco education. Luca Pacioli was born in 1446 or 1447 in Sansepolcro (Tuscany) where he received an abbaco education. [This was education in the vernacular (i.e. the local tongue) rather than Latin and focused on the knowledge required of merchants.] He moved to Venice around 1464 where he continued his own education while working as a tutor to the three sons of a merchant. It was during this period that he wrote his first book -- a treatise on arithmetic for the three boys he was tutoring. Between 1472 and 1475, he became a Franciscan friar. In 1475, he started teaching in Perugia and wrote a comprehensive abbaco textbook in the vernacular for his students during 1477 and 1478. It is thought that he then started teaching university mathematics (rather than abbaco) and he did so in a number of Italian universities, including Perugia, holding the first chair in mathematics in two of them. He also continued to work as a private abbaco tutor of mathematics and was, in fact, instructed to stop teaching at this level in Sansepolcro in 1491. In 1494, his first book to be printed, Summa de arithmetica, geometria, proportioni et proportionalita, was published in Venice. In 1497, he accepted an invitation from Lodovico Sforza ("Il Moro") to work in Milan. There he met, collaborated with, lived with, and taught mathematics to Leonardo da Vinci. In 1499, Pacioli and Leonardo were forced to flee Milan when Louis XII of France seized the city and drove their patron out. Their paths appear to have finally separated around 1506. Pacioli died aged 70 in 1517, most likely in Sansepolcro where it is thought he had spent much of his final years. De divina proportione (written in Milan in 1496–98, published in Venice in 1509). Two versions of the original manuscript are extant, one in the Biblioteca Ambrosiana in Milan, the other in the Bibliothèque Publique et Universitaire in Geneva. The subject was mathematical and artistic proportion, especially the mathematics of the golden ratio and its application in architecture. Leonardo da Vinci drew the illustrations of the regular solids in De divina proportione while he lived with and took mathematics lessons from Pacioli. Leonardo's drawings are probably the first illustrations of skeletonic solids, an easy distinction between front and back. The work also discusses the use of perspective by painters such as Piero della Francesca, Melozzo da Forlì, and Marco Palmezzano. As a side note, the "M" logo used by the Metropolitan Museum of Art in New York City is taken from De divina proportione. “ The Ancients, having taken into consideration the rigorous construction of the human body, elaborated all their works, as especially their holy temples, according to these proportions; for they found here the two principal figures without which no project is possible: the perfection of the circle, the principle of all regular bodies, and the equilateral square. ” —De divina proportione

While throned before your keys, under your drumming fingers awaits the most astounding standard computer typeface ever devised: BuGlobal. In addition to all the usual alphanumeric characters and symbols, this lone font lets you type more than 400 accented letters appearing in more than 80 English-variant languages worldwide, 70 common math and science symbols, and dozens of other useful characters —more than half a thousand all told— all within the digital parameters of one standard computer typeface, without needing any alternate keyboards or other clumsy digital luggage. Here is a sample: You can add any accent appearing in more than 80 English-variant languages used around the world to any letter appearing in all these languages simply by typing ANY letter then the accent. This includes more than 400 diacritic-laden letters in all —without needing to remember several keystrokes to type any of these letters as a few of them appear in standard computer typefaces. You can type more than 50 math/science symbols that do not appear in standard computer typefaces. These new symbols include several kinds of arrows plus constants, centerlines, dimensions, and graphs and scales that when retyped create continuous scales and graphs. Common symbols such as ballot boxes, rating stars, checkboxes, hearts, fancy fleurons, and similar motifs that do not appear in standard computer typefaces. Dozens of flashy arabesques like ========= [in BuGlobal these equal signs are kerned together so when you type them you create a continuous double line]. In this typeface more than 30 symbols that never appear twice in a row are kerned together so when you continuously type them you create all kinds of flashy arabesques that will make your typing more attractive. No other standard compute typeface allows you to do this. As for Beauty, BuGlobal’s characters are designed according to several axioms of ocular perception until each profile is as iconically simple as Shaker furniture. These axioms make BuGlobal’s letters easier to read compared to other typefaces, and a few of them are: Each letter should look much like the others but for one defining detail. The letters should be as similarly wide as possible. The letters’ midbars should be the same height and thickness. The higher the lowercase letters are compared to capital letters, the more legible and easily readable are their texts. BuGlobal has a typeface user’s guide, titled A Lovely Face, in which a description of each ocular axiom compares BuGlobal with Baskerville, Georgia, Palatino, and other commonly-used standard computer typefaces so you can quickly see why the other typefaces are inferior. You can download a pdf file of this typeface user’s guide, for free, at BuGlobal’s website, butlerfontforge.com, at any time so you can learn all about BuGlobal’s many amazingly new features before possibly buying it. BuGlobal’s plain letters are perfect for texts, its italics are gracefully emphatic, its bolds are ideal for titles and headers, and its arabesques are a fancy way to make your texts look dressy —all of which will add more shimmer to your semantic plumage. One good typeface is more useful than an infinity of poor ones. Robert Bringhurst