Tractate Shekalim

The Masechet Shekalim is the fourth treatise of the Seder Moed.
The Gemara Shekalim is the detailed study of the laws of the shekel (the half-shekel commandments) and the laws relating to the treasurers of the temple.
The Shekalim tractate is the only Gemara of the Yerushalmi Talmud (or Jerusalem Talmud) to be found in the Bavli Talmud.