Excavation by Schliemann and Calvert started at 1865. It was the first time a historical text was connected to an archaeological excavation. This was also the first stratigraphic excavation.

"The third phase of restorations, completed in 1817-1821, included archaeological surveys around the building, which helped locate the porticoes that flanked the ancient forum." (Ab Ev) - The oldest archaeological intervention carried out around the temple dates back to the years 1820-1821, when it was decided to restore the Maison Carrée to its actual height, three quarters of its base being buried at the time. (Informations complémentaires – Novembre 2022, p. 3)

"Scientific archaeological excavations of the megalithic sites have been undertaken since the second half of the 19th century and continue to this day." (AB Ev)

Altar of Hieron: "Amateur archaeological excavations were undertaken by Giuseppe Maria Capodieci in 1780, Saverio Landolina in 1813, and F.S. Cavallari in 1839. The only systematic and scientific excavations of the site were undertaken by Robert Koldewey and Otto Puchstein in 1893." (wiki)
See en.wikipedia.org

"1883: The Dutch paleoanthropologist Eugène Dubois undertook preliminary fieldwork at Sangiran. However, Dubois did not find many fossils of interest so he shifted his attention to Trinil in East Java where he found significant discoveries." (Wikipedia)
See en.wikipedia.org

Excavation of Herculaneum started at 1738. It was the first site ever to have been excavated.

"Lithography showing the first scientific excavation (1827–1834) at Voorburg-Arentsburg (Forum Hadriani)" (Nomination file, p. 48) – "Reuvens is famous for his excavations at the former estate of Arentsburg at Voorburg, where he lived in 1827–1834. Here, he uncovered parts of the Roman town of Forum Hadriani, recording his findings in excellent drawings and plans." (Nomination file, p. 88) – In 1820, "the first excavations in the area of the legionary fortress in Bonn took place." (Nomination file, p. 89) Between 1819 and 1844 Philipp Houben, who stood on the threshold between antique collecting and scientific archaeology, carried out extensive excavations in the area of the legionary camps, the CUT and the burial grounds at his own expense. (wiki)
See de.wikipedia.org

The archaeological area in Brescia had had "[a]rchaeological campaigns carried out since 1823 to the present". (Nomination file, p. 136)

"The burial mounds were mentioned by explorers and travellers to Bahrain throughout history. The first recorded excavations were in the late 1880s." (AB Ev)

In multiple locations, excavations were conducted before the 20th century, e.g. Regensburg (2nd half of the 19th century), Künzing (1897-8), Schlögen (1838-40), Enns (mid 19th century), Carnuntum (from 1885), Bratislava-Rusovce (1888-91). (Nomination file, p. 106-108, 111, 117)

Belzoni and Carter discovered many of the tombs in the 19th century. This was the first attempt to systematically excavate the Valley of the Kings, which had been a well-known source for antiques long before.

"Exploration of the necropolis at Calescoves by various archaeologists began in the 19th century" (Nomination file, p. 291)