The evolution of use of italic to show emphasis happened in the sixteenth century and was a clear norm by the seventeenth. The trend of presenting types as matching in typefounders' specimens developed also over this period. Italics developed stylistically over the following centuries, tracking changing tastes in calligraphy and type design. One major development that slowly became popular from the end of the seventeenth century was a switch to an open form "h" matching the "n", a development seen in the "Romain du roi" type of the 1690s, replacing the folded, closed-form "h" of sixteenth- and seventeenth-century italics, and sometimes simplification of the entrance stroke.