Aulus Gellius, Noctes Atticarum  14.7.7 (ca. A.D. 180):

Tum adscripsit de locis in quibus senatusconsultum fieri iure posset, docuitque confirmavitque, nisi in loco per augurem constituto, quod "templum" appellaretur, senatusconsultum factum esset, iustum id non fuisse.  Propteria et in curia Hostilia et in Pompeia et post in Iulia, cum profana ea loca fuissent, templa esse per augures consituta ut in iis senatuconsulta more maiorum iusta fieri possent.  Inter quae id quoque scriptum reliquit, non omnes aedes sacras templa esse ac ne aedem quidem Vestae templum esse. 

Varro then added a list of the places in which a decree of the senate might lawfully be made, and he showed and maintained that this was regular only in a place which had been appointed by an augur, and called a "temple." Therefore in the Hostilian curia and in the Pompeian curia and later in the Julian curia, since those were unconsecrated places, temples were established by the augurs, in order that in those places lawful decrees of the senate might be made according to ancestral customs.  In connection with which he also wrote this, that not all sacred places are temples, and that not even the aedes of Vestae was a temple.  (J. Rolfe,  trans.)