Temple Complex The Temple area during Jesus's time consisted of a large platform held up by retaining walls built up by King Herod's construction crew and was not finished for decades after Jesus's incarnation. Ironically it may have been considered "finished" just a little while before 70 A.D. when the Romans completely demolished the Temple! (Finished during the reign of Agrippa II, great grandson of Herod; See Flavius Josephus, Wars of the Jews; who described the demolition and conflagration, in loco)
Buildings The use of the plural "buildings" in these scriptures accurately referred to The Temple Complex proper: the Temple, the Levitical storage rooms, as well as buildings that housed the Sanhedrin councils, the rooms for the sacrificial animals, and the many lecture halls where rabbis, scribes---and Jesus with His disciples---argued or taught the precepts of the Law of Moses.
These were all destroyed during the Destruction of Jerusalem in 70 A.D. just as Jesus prophesied. [regardless of modern Jewish protestation]. A few hundred years later, the anti-Christian emperor, Flavius C. Julianus the Apostate (361-363), destroyed any remaining construction that the Christians pilgrims considered part of the sacred history. He even leveled the hill of Mt. Calvary (Golgotha), such that it is non-existent today! (Don't let tour guides mislead you!) {See Wace& Piercy, A Dictionary of Early Christian Biography, for detailed biography of Emperor Julian, p. 580}
Modern Visible Sights What most tourists today don't realize is the fact that The Wall around the whole city of Jerusalem seen today was built by the Turkish Ottomans in 1517 A.D. (Wikipedia, "Western Wall") Some of the visible wall parts and towers we see today, were also built by the Crusaders. For centuries the Jew were not allowed to live in the city, and often only allowed once a year to go to the "perforated stone (Rock of Moriah) to groan and rend their garments.
The Western Wall, which became the new location for pilgrimage because of the Mosque of the Moslems was built over the Rock, is merely part of Herod's retaining wall for the whole Temple complex. It is NOT part of the Temple where sacrifices were made, and ceremonies carried out. Nor is it part of the "buildings" Jesus designated for destruction.
The Wall consists of 45 stone courses: 28 above ground, and 17 underground. The first seven above ground are from the Herodian era. The next four courses of smaller plainly dressed stones, are Umayyad construction (8th century, Early Moslem period). Above that are 16 to17 courses of small stones from the Malmuk period (13-16th centuries) and later. (Wikipedia, "Western Wall")
Reliable Prophecy The prophecy of Jesus is accurate and the scriptures remain reliable. And the groaning over the loss of the Temple that had been going on for centuries, remains an accurate description of the type of consequence for rejecting the Messiah, and the refusal to accept the one-time Sacrifice of the Lamb of God.