Starting in May 2022, selected Smithsonian Libraries and Archives physical locations will begin reopening to the public with limited availability. Please see Library Locations and Smithsonian Institution Archives reference for more information.
Starting in May 2022, selected Smithsonian Libraries and Archives physical locations will begin reopening to the public with limited availability. Please see Library Locations and Smithsonian Institution Archives reference for more information.
![Cover of Su[m]ma de arithmetica geometria proportioni [et] proportionalita](https://library.si.edu/sites/default/files/styles/slick_300/public/books/covers/summadearithmeti00paci_cover.jpg?itok=4VowIpxD "Cover of Su[m]ma de arithmetica geometria proportioni [et] proportionalita")
