Check out Old Lisbon's must-see buildings below:

São Jorge Castle

A post shared by Samanta Natalo (@sa_natalo) on Jun 15, 2017 at 8:17pm PDT

Architect: Custódio Vieira da Silva, Filippo Terzi, João Gillot,Manuel do Couto, Teodósio de Frias, the Younger Built: 48 BC Type: Castle Address: R. de Santa Cruz do Castelo, 1100-129 Lisboa, Portugal Open to the Public: Yes Hours: Daily: 9:00am - 9:00pm Website: www.castelodesaojorge.pt/pt/

Convento do Carmo

A post shared by Polly Auyeung (@p__lly) on Jun 17, 2017 at 5:19pm PDT

Architect: Afonso Eanes, Gonçalo Eanes, Rodrigo Eanes, Leonel Gaia Built: 1423 Type: Roman Catholic Convent Address: Largo do Carmo, 1200-092 Lisboa, Portugal Open to the Public: Yes

Belem Tower

A post shared by PreciousMoments✨ (@preciousmomentsnl) on Jun 15, 2017 at 10:21am PDT

Architect: Francisco de Arruda, Francisco de Holanda, António Viana Barreto, António de Azevedo e Cunha Built: 1519 Type: Fortified Tower Address: Av. Brasília, 1400-038 Lisboa, Portugal Open to the Public: Yes Hours: October to April: 10:00am - 5:30pm, May to September: 10:00am - 6:30pm Cost: 6,00 € Website: www.torrebelem.gov.pt/pt/index.php

Igreja de São Roque (São Roque Church)

A post shared by David Harris (@shaggy_dog_photography) on Oct 19, 2016 at 1:16pm PDT

Architect: Vieira Lusitano, Simão Rodrigues, Luísa Todi Built: 1619 Type: Roman Catholic Convent, Museum Address: Largo Trindade Coelho, 1200-470 Lisboa, Portugal Open to the Public: Yes Hours: Monday: 2:00pm - 6:00pm, Tuesday to Sunday: 10:00am - 6:00pm Cost: 2,50 € Website: www.museu-saoroque.com/pt/igreja-de-sao-roque.aspx

Águas Livres Aqueduct

A post shared by trepa (@trepa.rita) on Apr 18, 2017 at 12:32pm PDT

Architect: Antonio Canevari, Carlos Mardel, João Frederico Ludovice, Reinaldo Manuel dos Santos Built: 1748 Type: Aquaduct Address: Calçada da Quintinha 6, 1070-225 Lisboa, Portugal Website: www.epal.pt/

Baixa Pombalina

A post shared by renato_foi_ali (@renatocg25) on May 12, 2017 at 6:02pm PDT

Type: Neighbourhood Address: 1100-042 Lisbon, Portugal Open to the Public: Yes Hours: Open 24/7

Padrão dos Descobrimentos (Monument to Discoveries)

A post shared by Claudia Prandini (@clau5000) on Jun 16, 2017 at 5:20am PDT

Architect: Cottinelli Telmo, sculptor Leopoldo de Almeida Built: 1960 Type: Monument Address: Av. Brasília, 1400-038 Lisboa, Portugal Open to the Public: Yes Hours: Summer: 10:00am - 7:00pm, Winter: 10:00am - 6:00pm, Website: www.padraodosdescobrimentos.pt/pt/monumento/ [mappress mapid="61"]