proseuche
A place of prayer; among the Jews, one that was not a synagogue, or the temple, usually roofless.
On behalf of king Ptolemy and queen Berenice his sister and wife and their children, the Jews (dedicated) the proseuche.
Where it comes from
From Ancient Greek προσευχή (proseukhḗ). According to Strong's Exhaustive Concordance of the Bible: : prayer (worship); by implication, an oratory (chapel):—X pray earnestly, prayer.
Adapted from the Wiktionary entry proseuche (CC BY-SA 4.0).