When we were having the Categories subject in Algebra II (maths degree) half-jokingly with a few friends we built a category (with operations, universal propert

When we were having the Categories subject in Algebra II (maths degree) half-jokingly with a few friends we built a category (with operations, universal properties and objects and all that funny and weird stuff) based on the columns of the university courtyard (this one: http://blocmat.files.wordpress.com/2011/03/matefestub-ba.jpg http://blocmat.files.wordpress.com/2011/03/matefestub-ba.jpg)