Dating objects

Jorge is now a place where you can enjoy our heritage, get to know a little about Lisboa’s History at the Permanent Exhibition, explore the traces of the Moorish neighbourhood dating back from the 11th century at the Archaeological Site, discover yet unseen sights over the city on the Camera Obscura, stroll across the gardens and the belvederes, take a break at the Café do Castelo, participate of the guided tours or other didactical activities, or simply be enchanted by music, theatre, dancing and the talk shops on heritage that liven up your days at this remarkable Monument in Lisboa.This camera obscura, an optical system of lenses and mirrors, provides 360º detailed views of the city in real time, including its monuments, most emblematic areas, the river and the bustle of Lisbon itself.In reading Earth history, these layers would be “read” from bottom to top or oldest to most recent.If certain fossils are typically found only in a certain rock unit and are found in many places worldwide, they may be useful as index or guide fossils in finding the age of undated strata.Specific rock formations are indicative of a particular type of environment existing when the rock was being formed.

Open for visitation, the collection consists of objects found in the archaeological area (Archaeological Site) and provides an introduction to the various cultures and lifestyles from the 7th century B. to the 18th century which contributed to building modern-day Lisbon, with particular emphasis on the Moorish period from the 11th – 12th centuries. Jorge is the only remaining green space in Lisbon where the primary native species of Portuguese forest predominate.

Visitors can observe such trees as cork oak, olive, carob, strawberry, umbrella pine and various fruit trees, in memory of the vegetable garden of the Royal Palace of the Alcáçova. C.; (2) the remnants of the Moorish era residential area, from the time of the castle’s construction in the mid-11th century; (3) the ruins of the last palatine residence in the former alcáçova, destroyed by the earthquake of 1755.

The buildings now housing the Permanent Exhibition, Café and Casa do Leão Restaurant provide the most significant evidence of the former medieval royal residence.

The study and comparison of exposed rock layers or strata in different areas of Earth led scientists in the early 19th century to propose that the rock layers could be correlated from place to place.

Locally, physical characteristics of rocks can be compared and correlated.

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