Examples of websites using
Baskerville
(Baskerville is a serif font designed by URW Type Foundry and released by Bitstream. The font family includes multiple styles with variations in weights and matching italics)
with
Avenir
(Avenir is a sans-serif font designed by Adrian Frutiger and Nadine Chahine, released by Linotype in 1988. It features clean and modern letterforms and is available in multiple weights and styles)