The _Rath-na-Riogh_ is identical with Teamur, and is, in fact, _the_ ancient Tara, or royal residence, around which other scarcely less important buildings were gradually erected.

It was also called _Cathair Crofinn_.

The name of _Cathair_ was exclusively applied to circular stone fortifications built without cement; and stones still remain which probably formed a portion of the original building.

In ancient Irish poems this fortification is sometimes called the Strong Tower of Teamur, an appellation never applied to a rath, but constantly to a _Cathair_, or circular stone fort.
The Rath of the Synods obtained its name at a comparatively recent period.

The situation is distinctly pointed out both in the prose and verse accounts.