Hercules worstelt met Acheloüs (c. 1528) by Gabriel Salmon https://www.rawpixel.com/image/13780632/hercules-worstelt-met-achelous-c-1528-gabriel-salmonFree Image from public domain licenseTwo bulls fighting by a pond sending frogs leaping into the water. Etching by W.-S. Howitt, ca 1800. https://www.rawpixel.com/image/13986623/image-dog-cartoon-artFree Image from public domain licenseBullfight from Paris-Neuf, Or Dream And Reality. Great Phantasmagoria (1861) published by Charles Simon Pascal Soullier.… https://www.rawpixel.com/image/572700/bullfight-vintage-drawingFree Image from public domain licensePNG Drawing of a bullfight, transparent background https://www.rawpixel.com/image/572019/png-drawing-bullfight-transparent-backgroundView license