The pillars of Islam are...

1- The belief (Imaan): That there is no God to be worshipped except Allaah (the one God) and that Muhammad (peace and blessings of God be upon him) is His Messenger.

2- Performing the prescribed prayers (Salaat): five times a day.

3- Fasting (Siyaam): Once a year, from sunrise to sunset throughout the entire month of Ramadhan.

4- Charity (Zakaat): Which is paid to the poor and needy once every year.

5- Hajj: Which is the pilgrimage to Makkah once in a lifetime if one is physically able and can afford it financially.

Pillars are part of a building. The building in this case is the perfect human being who cares and protects the rights of all creations and fellow humans, thus establishing a society in which truth and justice and peace is supreme.