Examples of websites using
Helvetica
(Helvetica is a sans serif font designed by Max Miedinger, Linotype Design Studio, and released by Linotype in 1957. It is available in a wide range of styles and weights)
with
GT Sectra
(GT Sectra is a serif font designed by Marc Kappeler and Dominik Huber and released by Grilli Type in 2014. It is available in three optical sizes (Text, Display, and Micro) with a total of 24 individual styles)
