International Day for Monuments and Sites / World Heritage Day
April 18th celebrates the world's built cultural heritage.
This day was established by UNESCO as the International Day for Monuments and Sites in 1983.
From then on, this day has been offering the opportunity to increase public awareness to the diversity and vulnerability of the world’s built monuments and heritage sites and the efforts required to protect and conserve them. This day is also commonly known as World Heritage Day.
The heritage of commemoration takes a variety of forms: engraved inscriptions, mausoleums of exceptional architecture or works of monumental sculpture, more modest elements reflecting vernacular traditions or dedicated landscapes such as cemeteries or memorial gardens.
Given that this year April 18th corresponds to the Good Friday, the GDPC suggests that activities can extend from the previous weekend and until the end of the Easter week (April 12th to 20th).
The detailed program for Lisbon can be found here.