The prerequisite cemetary fence and gate pillars.
For my cemetary fence I used Scott Messinger's plans. For finials I made a wood original, made a RTV silicone mold, and cast finials using Hydrostone. The posts on the end of each fence section are 2x2's with the top machined to be a bigger version of the finials.
The big pillars are 2x2 frames with 1.5 inch pink insulation glued to the outside. The insulation is treated much like my tombstones. The crossmembers in the 2x2 frame have holes to accept a 1/2 inch id PVC pipe which will run up the center of the pillar and stick out the top. The pvc has a spike with a skull on the top. The PVC will also receive a piece of rebar pounded into the ground to help stabilize the pillar.