quinet - CC BY 2.0 Bachelot Pierre J-P - CC BY-SA 3.0 D. Gordon E. Robertson - CC BY-SA 3.0 Olga Stalska stalskaya - CC0 Martin Lang - CC BY 2.0 Pavel Špindler - CC BY 3.0 JYB Devot - CC BY-SA 4.0 grooverpedro - CC BY 2.0 Arabsalam - CC BY-SA 4.0 Carlos Adampol Galindo - CC BY-SA 2.0 Jduranboger - CC BY-SA 3.0 Gabito Giménez - CC BY 2.0 No machine-readable author provided. Jose C. assumed (based on copyright claims). - Public domain Mx._Granger - CC0 Bureau of Engraving and Printing (work for hire) - Public domain Allard Schmidt (The Netherlands) - Public domain Pavel Špindler - CC BY 3.0 Pavel Špindler - CC BY 3.0 Gavieiro Juan M - CC BY-SA 3.0 Pavel Špindler - CC BY 3.0 Pedro Szekely from Los Angeles, USA - CC BY-SA 2.0 JYB Devot - CC BY-SA 4.0 Alicia Nijdam - CC BY 2.0 Pepe Reyes peperg - CC0 Guillermo Arévalo Aucahuasi - CC BY-SA 3.0 No machine-readable author provided. Ed88 assumed (based on copyright claims). - Public domain David Stanley from Nanaimo, Canada - CC BY 2.0 David Stanley from Nanaimo, Canada - CC BY 2.0 Mx._Granger - CC0 Carlos Medina-Saldivar - CC BY-SA 4.0 Ondando - CC BY-SA 3.0 JYB Devot - CC BY-SA 4.0 Ewicho - CC BY-SA 4.0 Gavieiro Juan M - CC BY-SA 3.0 Pavel Špindler - CC BY 3.0 Jaan-Cornelius K. - CC BY-SA 2.0 Ben Stubbs - CC BY 2.0 Dan Lundberg - CC BY-SA 2.0 Jorge Nicolás Bohórquez - CC BY-SA 4.0 Caupolican at German Wikipedia - CC BY-SA 3.0 Murray Foubister - CC BY-SA 2.0 No images