I designed this lamp-post in 3D Builder using parts from Shira's Gothic Lantern and Agent MSG's Gothic Lantern Base with Brackets.

The post has holes in the top that should line up with the holes in the lantern so you can use dowels or bolts to secure. Agent MSG's base has brackets for lamp holder fitting which are duplicated at the top of this lamp-post. I've printed everything at 110% so that I can fit an led flame-effect bulb.

If you print it upside-down it only uses a tiny bit of support on the outside. My print took a little over 30 hrs. I printed at low quality as I'm going to spray with hammerite 'black hammered finish' to give a wrought iron effect.