Examples of websites using
Knockout
(Knockout is a sans-serif font designed by Jonathan Hoefler and released by Hoefler&Co. The font is available in multiple styles, including heavyweight, medium, thin, and ultra-thin, each with a distinctive geometric aesthetic)
with
Caslon
(Caslon is a serif font designed by Dave Farey and William Caslon and released by ITC in 1725. The font family consists of multiple styles in various weights and matching italics)