Who knows three hundred fifteen?
?חמישה עשר ושלוש מאות - מי יודע
In the spirit of the song "Echad - mi yodeya", please post interesting and significant Jewish facts about the number 315.
Is there a lazy gematria answer to this one? Perhaps, but it's still not ideal.
Check out mi-yodeya-series for the previous three hundred fourteen entries in this ongoing series.
Please include sources for your information wherever possible, as with all other answers on this site.