When will the temple be rebuilt?

It is commonly said among Christians that before Christ comes, the Jews must rebuild their Temple, and then the antichrist will come and sit in it, proclaiming himself to be God (see 2 Thessalonians). But is this the correct interpretation of "Temple" in that verse, or is it a deception? Didn't Paul also write that "ye are the Temple of God?" Didn't the Jews try to rebuild the temple in 300's? What happened to that endeavor?