"In templo sunt arae sacrae."

Translation: In the temple are the sacred altars.

[Ehsan_Mehmed]

Bad English translation I guess (?)

[NeilMitche6]

Not really, the sentence emphasises that the altars are in the temple. Actually, the altars were outside the temples, not inside so the emphasis is reasonable.

[PERCE_NEIGE]

In the temple, are the sacred altars. (with a comma)

Grammatically explained here: http://users.utu.fi/micnel/comma.htm

[Shivadatha5]

google says "altare" means altar... and plural form as "alataria "
but here is shows "arae"...
check out. !!