The Thesis project

LucasFonts is the company of Dutch type designer
Luc(as) de Groot.

Luc(as) de Groot is mostly known for his Thesis project. Besides these and other retail fonts available via our web shop, LucasFonts offers every possible kind of service in adapting fonts to your needs and designing customized glyphs or complete typefaces. Contact

With Thesis, Luc(as) de Groot pioneered the concept of the all-purpose type system or superfamily. Thesis provides the user with three compatible styles – TheSans, TheMix and TheSerif – in a range of eight weights including real italics. The Thesis family has been expanded over the years (TheSans and TheMix are now available in three widths). TheSans also offers three ultra-narrow widths and several sub-families.

Speaking events

January 22, 2019 | Staatsbibliothek zu Berlin
Dan Reynolds: Die Verbreitung einzelner serifenloser Schriften durch das deutschsprachige Schriftgießereigewerbe im 19. Jahrhundert

December 7-8, 2018 | Wrocław Type Forum
Dan Reynolds: New details about the origins of Akzidenz-Grotesk

November 30, 2018 | FURE 2018
Sonja Knecht: untitled lecture

October 24, 2018 | tga Vienna
Thom Janssen: Making tools for making type

October 23–24, 2018 | HBK Saar
Sonja Knecht: Text, Sex, Scheiße extended lecture & workshop

TheSans C5 and the Mix C5

Our new and updated packages TheSans C5 and TheMix C5 contain around 1500 glyphs per font and support standard Latin, Central European, Turkish, Baltic and Vietnamese. We also added a bunch of typographic features such as 10 different figure sets, nearly hundred ligatures, stylistic alternates, arrows and ornaments. Each packages comes in 8 weights plus italics. TheSans C5 and TheMix C5 are available as OpenType fonts and as manually hinted webfonts. You can order currently only by phone or e-mail.

Edgar Waltherts notes on Taz development

Slanted, one of Germanys most frequented blogs on graphic design and typography, has published a comprehensive article on LucasFonts latest releases Taz Wide and Taz Extended. Dive in and learn about super families, interpolation curves and hardware stores. Read more

Luc(as) on Bulgarian TV

Big in Bulgaria! On the occasion of TYPOFEST in Sofia and Ploviv, Luc(as) gave an interview on Bulgarian TV. He aimed to raise the awareness for the beautiful Cyrillic shapes used in Bulgaria, and he sneaked in a call for action to persuade Microsoft to officially adapt Bulgarian glyph variants. See interview