[JRandomFreeper]

Architechural do-dads. I don't think they were structural.

We just glossed over that at culinary school, so I'm not completely clear on it myself.

/johnny

[TigersEye]

"They are small terracotta tubes with one pointed end. Put one into the other, they formed interlocking, snake-like tiles. Rows of these so-called fictile tubes were used by Roman builders to relieve the weight of vaulting,"

That makes it sound like they were structural but I don't have the slightest idea how they were used. They seem too small to have any value in a building.