J. B. Bury argued he built the 6th century temple because of accounts saying the fourth century temple was built by Xenodorus.
John Henry Middleton dated Spintharus's construction to the latter half of the sixth century, BC.
Karl Julius Sillig wrote Spintharus lived around the time of the 60th Olympiad, i.e., 540 BC. However,
James George Frazer argued he built the fourth century temple. He notes that Xenodorus is inscribed as the fourth century architect, but suggests Spintharus planned and began construction and Xenodorus continued construction after his death. Janina K. Darling reports Spintharus began construction in 346 BC and after his death the project was completed by the architects Xenodorus and Agathon. Hélène Perdicoyianni-Paléologou also lists all three architects as working on the rebuilding of the temple, which was completed in 320 BC.
William Bell Dinsmoor notes that expense reports suggest that Xenodorus and Agathon continued Spintharus' construction on the fourth century temple. It has also been suggested that Spintharus was the "chief designer" whereas Xenodorus and Agathon were directly in charge of supervising construction. ==Other possible works==