The Hospital Termal Rainha D. Leonor (Queen Leonor Spring Water Hospital, or Thermal Hospital), a medical spa offering physician-prescribed treatment in sulphurous waters, is managed by . The hospital is the world's oldest purpose-built thermal medical institution. Among the non-medical holdings of the Centro Hospitlar–legacies of Queen Leonor–are the Museu do Hospital e das Caldas (Museum of the Hospital and Spa); the Igreja de Nossa Senhora do Pópulo and Igreja de São Sebastião, churches; Parque D. Carlos I, a public park; and Mata Rainha D. Leonor, woods adjacent to the park. In 1512, Queen Leonor established the Santa Casa da Misericórdia das Caldas da Rainha (Holy House of Mercy), a charitable institution dedicated to helping those in need. Having expanded to other cities, the Holy House continues its work to the present day.