The National Pantheon in Lisbon, also known as the Church of Santa Engrácia, is a grand baroque building located in the historic neighborhood of Alfama. It is a National Monument of Portugal and is known for its striking architecture and historical significance.

The Pantheon was originally built as a church in the 17th century but was later converted into a pantheon to honor the country's most prominent figures. It houses the tombs of some of Portugal's most famous historical figures such as explorers Vasco da Gama and Pedro Álvares Cabral, and poets Luís de Camões and Fernando Pessoa.

The most striking feature of the Pantheon is its dome, which is the largest unsupported dome in the world. Visitors can climb to the top of the dome to enjoy panoramic views of the city.

The Pantheon is also home to a small museum that exhibits some of the tombs and the history of the church.

Overall, the National Pantheon is a must-visit destination for anyone interested in the history and culture of Portugal. It offers a great opportunity to learn about the country's most prominent figures and admire the beautiful baroque architecture.