May is the most favorite of Madrileños (people living in Madrid) for the reasons of festivals! Fiesta Dos de Mayo, San Isidro Festiva, Flamenco Festival Madrid, etc. What else do you know?
Las Ventas is the most famous bullring in eastern Madrid with the capacity of 23,800 seats. A proposal from José Espeliú to the Madrid Provincial Council about his land donation had been adopted in 1922. This bullring, then, had been constructed from 1922 to 1929.