173 Rustica

From the Roman chapter of Learn Calligraphy.  

Rustica narrates the decline of the great letters of the Roman empire, telescoping 500 years of evolution into 26 letters.  These stone-carved classics turned into utilitarian manuscript letters, through three major changes that you can re-enact: narrow the proportions of the letters to between 1 x 2 and 3 x 5; steepen the two pen angles to a single constant 60°; and add a wavy serif.