Set of iron wrought fences, gates, signboards and lanterns with decorative ornaments Vector illustration photo
Les entrelacs celtes et chrétiens
♡ Chartres , France June 21 when the sun is at the Zenith (solar Noon) of The Place , a sunray passing trough a hole illuminates a nail stuck in the ground ! !
see Martin Kemps The Science of Art (1990)
My favorite: tell someone that ∑n=1∞12n=1 and they probably won't believe you. However, show them the below
Dibujo Tecnico Bachillerato - Axonometria - 2