Whether Ictinus lived long enough to complete the temple to Ceres and Proserpine or not, or was called away for other purposes, is not known, but it appears that other architects were associated with its design and erection, both before as well as after his connection with it. Corœbus is mentioned also as an architect, in the employ of Pericles, who began the work on the mystic cell, but that his sudden death resulted in the substitution of Ictinus. It is more probable, however, that Ictinus had previously furnished the design of the building and that Corœbus had been merely acting under his supervision. Following Ictinus was another Athenian architect appointed by Pericles, and the designer of the demos of Cholargos. He is said to have built the pediment of the temple with the timpanum open, according to an ancient fashion, in order to light the cell, which, if Strabo is to be believed, was capable of accommodating thirty thousand persons. In the time of Demetrius Phalereus, the immediate successor of Alexander, Philo, or Philon, as his name is sometimes written, a very eminent architect, also of Athens, was engaged to add a portico of twelve Doric columns to this temple of Ceres. That Metagenes of Xypete, and son of Ctesiphon, who has already been discussed in our allusion to the temple of Diana at Ephesus, should be mentioned as the architect who completed the entablature and an upper row of columns to this Eleusian temple, is probably a mistake. The time of Metagenes was, as we have seen, much earlier (about 560 B.C.), and while he might have been engaged upon the first temple to Ceres at Eleusis, it is quite impossible for him to have been employed by Pericles in the building of that with which Ictinus had to do. When Alaric, the German, made his angry invasion into Greece in 396 B.C., because refused command of the armies of the Eastern empire, he destroyed very many works of Greek art, and this temple among them was one of the unfortunates that assisted to satiate his wrath.