Spintharus of Corinth (Ancient Greek: Σπίνθαρος, romanized: Spíntharos) was an ancient Greek architect. Pausanias reported in his Description of Greece that the Alcmaeonids hired him to build a temple at Delphi.^{[lower-alpha 1]} This is the only record of Spintharus.^[1] The temple to Apollo at Delphi had to be rebuilt after a fire in 548 BC and again after an earthquake in 373 BC.^[2] Historians have offered competing claims as to which temple Spintharus constructed.

J. B. Bury argued he built the 6th century temple because of accounts saying the fourth century temple was built by Xenodorus.^[3] John Henry Middleton dated Spintharus's construction to the latter half of the sixth century, BC.^[4]: 310 Karl Julius Sillig wrote Spintharus lived around the time of the 60th Olympiad,^[5] 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.^[6][7] Janina K. Darling reports Spintharus began construction in 346 BC and after his death the project was completed by the architects Xenodorus and Agathon.^[8]: 182 Hélène Perdicoyianni-Paléologou also lists all three architects as working on the rebuilding of the temple, which was completed in 320 BC.^[9] William Bell Dinsmoor notes that expense reports suggest that Xenodorus and Agathon continued Spintharus' construction on the fourth century temple.^[10] It has also been suggested that Spintharus was the "chief designer" whereas Xenodorus and Agathon were directly in charge of supervising construction.^[11]

Middleton also suggested Spintharus also built the temple at Corinth due to similarities in some of the details such as the hypotrachelia.^[12]

• Ancient Greek architecture
• List of Ancient Greek temples
• Apollo § Temples of Apollo