Add to ORKGDetail of the portico, showing flat Tuscan double pilasters at corner; It was not until 1658 that he had the opportunity to design entire churches, albeit relatively small ones. In that year he began S Tommaso da Villanova (completed 1661) at Castel Gandolfo and S Andrea al Quirinale in Rome. In 1662-1664 he built S Maria dell' Assunzione at Ariccia. All three are variations on a domed, centralized plan. The church at Ariccia is a more interesting scheme based on a circular plan and having a hemispherical dome rising straight from the cornice of the main walls. It is entered through a triple-arched and pedimented portico with pilasters. This remarkably pure combination of cylinder, hemisphere and portico was clearly inspired by Bernini's co...