[1] Pi, under construction from January 2005 to November 2006 and opened in December 2006, consists of statistical information and a representation of π to 478 decimal places.
A more recent project is the calculation of the decimal places of π, indicating the importance of the eponymous media for installation of their number and infinity.
In addition to the number pi, there is a total of 16 factoids of reflective display cases that convey a variety of statistical data in real time.
[1] Apart from the World population there are also topics such as the worldwide number of malnourished children and the growth of Sahara since the beginning of the year.
In the middle of the passage standing there is a glass case with images, texts and books on the subjects of population and migration.