Zero
Archimedes by Domenico-Fetti (1620). Public domain.
The Moneychanger and his Wife. by Marinus van Reymerswaele (c.1490–c.1546). Public domain.
Landscape with Cottage and Haybam by Rembrandt Harmenszoon van Rijn (1606 - 1669). Public domain.
Le Roi Boit (The King Drinks) by Jacob Jordaens (1593-1678). Public domain.
One
Craftsman House by David Sawyer. CC BY-SA 2.0.
Untitled. (Tuscany) by Daniel Genser. CCO 1.0. unsplash.com
Tromso Cityscape by Vichaya Kiatying-Angsulee. Paid license.
Frank Lloyd Wright house in Andrew Warren Historic District, Wausau, Wisconsin by Americasroof. CC BY-SA 2.5.
Cottage by Joe Dyndale. CC BY-ND 2.0.
Three
Grace and Robert Miller Ranch by Acroterion. CC BY-SA 3.0.
Inside a Post Office Savings Bank deposit book by UK General Post Office. Public domain.
ellipsis
Potala Palace in Lhasa by Coolmanjackey. CC BY-SA 3.0.
Untitled. (MacBook Air and java) by Alejandro Escamilla. CCO 1.0. unsplash.com
Untitled. (Sepia road) by Noel Lopez. CCO 1.0. unsplash.com