Mineral Cost: 100
Hit Points: 200
Shield Points: 200
Produces: N/A
Requires: Nexus

The Pylon provides power to the Protoss base and is necessary for the operation of every building except for the Nexus.  A building must be within the range of a Pylon to receive functioning power.  Without Pylons, a Protoss base is rendered useless and therefore it is important to closely guard them.

There are two Pylons in this screenshot, they are the encased crystals behind the Protoss defenses: