In Warhammer 3rd edition the army of Bretonnia could include a war altar.
I always had a soft spot or war altars, as a kid, playing Warhammer 3rd edition, I tried to scratch build a Nurgle altar, inspired by the amazing one by Ivan Bartleet (you can see it here), but my 16 years old skill level didn't allow for a great result.
Roll forward 32 years, I decided to try again, this time with a Bretonnian one.
The army list entry allows for a wagon to carry the altar, as well as a maximum of 5 altar guards with heavy armour and halberds, so that's what I aimed for. I realized later that I should have given it a big banner as one with magical properties can also be added, but the model was compete, so it will have to do without.
The guards are from Grenadier models, I recently acquired them in a trade, they are quite chunky, but I like the models quite a bit.