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Beautiful pen and marker drawing from a street flier
Bouncer at Comet TavernCircinus Circle (Wikipedia) A circle is a shape consisting of all points in a plane that are at a given distance from a given point, the centre. The distance between any point of the circle and the centre is called the radius. degree 
Euler is credited for popularizing the Greek letter Ï€ (lowercase pi) to denote the ratio of a circle’s circumference to its diameter, as well as first using the notation f(x) for the value of a function, the letter i to express the imaginary unit √-1, the Greek letter Σ (capital sigma) to express summations, the Greek letter Δ (capital delta) for finite differences, and lowercase letters to represent the sides of a triangle while representing the angles as capital letters. 
Exploring Public Space
Face in the bricks
Impeach Trump Impeach Pence
Lamps in the CommonsOctans 
Painting in the lobby
Pareidolia in the alley
Textured ground
The back of a sweatshirt given to the HoloLens team
The site of Tyburn Tree🟡
