S.P.Q.R.

or SPQR

Origin of S.P.Q.R.

From the Latin word Senātus Populusque Rōmānus
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Word Origin and History for s.p.q.r.

S.P.Q.R.

the insignia of Rome, from Latin Senatus Populusque Romanus "the Senate and People of Rome."

Online Etymology Dictionary, © 2010 Douglas Harper