The Chiado is a neighborhood in the historic center of Lisbon, the capital of Portugal. Chiado is an important cultural and commercial district, known for its luxury shopping, historic landmarks, and its numerous theatres and museums. In 1988, the Chiado area was severely affected by a fire. Following an extensive rehabilitation project by Pritzker-winning architect Álvaro Siza Vieira, the Chiado has recovered and become one of the most valuable real estate markets in Portugal.

Álvaro Joaquim de Melo Siza Vieira is a Portuguese architect, and architectural educator. He is internationally known as Álvaro Siza and in Portugal as Siza Vieira.