After de la Nada's brief account of the ruins no attention was paid to them until 1773 when one Don Ramon de Ordoñez y Aguilar examined Palenque and sent a report to the Capitan General in Antigua Guatemala, a further examination was made in 1784 saying that the ruins were of particular interest, so two years later surveyor and architect Antonio Bernasconi was sent with a small military force under Colonel Antonio del Rio to examine the site in more detail. Del Rio's forces smashed through several walls to see what could be found, doing a fair amount of damage to the Palace, while Bernasconi made the first map of the site as well as drawing copies of a few of the bas-relief figures and sculptures. Draughtsman Luciano Castañeda made more drawings in 1807, and the first book on Palenque, Descriptions of the Ruins of an Ancient City, discovered near Palenque, was published in London in 1822 based on the reports of those last two expeditions together with engravings based on Bernasconi and Castañedas drawings; two more publications in 1834 contained descriptions and drawings based on the same sources.
Juan Galindo visited Palenque in 1831, and filed a report with the Central American government. He was the first to note that the figures depicted in Palenque's ancient art looked like the local Native Americans; some other early explorers, even years later, attributed the site to such distant peoples as Egyptians, Polynesians, or the Lost Tribes of Israel.
Starting in 1832 Jean Frederic Waldeck spent two years at Palenque making numerous drawings, but most of his work was not published until 1866. Meanwhile the site was visited in 1840 first by Patrick Walker and Herbert Caddy on a mission from the governor of British Honduras, and then by John Lloyd Stephens and Frederick Catherwood who published an illustrated account the following year which was greatly superior to the previous accounts of the ruins.
Désiré Charnay made the first photographs of Palenque in 1858, and returned in 1881 - 1882. Alfred Maudslay encamped at the ruins in 1890 - 1891 and made extensive photographs of all the art and inscriptions he could find, and made paper and plaster molds of many of the inscriptions, setting a high standard for all future investigators to follow.
Several other expeditions visited the ruins before Frans Blom of Tulane University in 1923, who made superior maps of both the main site and various previously neglected outlying ruins and filed a report for the Mexican government on recommendations on work that could be done to preserve the ruins.
From 1949 through 1952 Alberto Ruz Lhuillier supervised excavations and consolidations of the site for Mexico's National Institute of Anthropology and History (INAH); it was Ruz Lhuillier who was the first person to gaze upon Pacal The Great's tomb in over a thousand years. Further INAH work was done in lead by Jorge Acosta into the 1970s.
In 1973 the first of the very productive Palenque "Mesa Redonda"s (Round tables) was held here on the inspiration of Merle Green Robertson; thereafter every few years leading Mayanists would meet at Palenque to discuss and examine new findings in the field. Meanwhile Robertson was conducting a detailed examination of all art at Palenque, including recording all the traces of color on the sculpture.
The 1970s also saw a small museum built at the site.
In the last 15 or 20 years, a great deal more of the site has been excavated, but currently, archaeologists estimate that only 5% of the total city has been uncovered.
Palenque remains much visited, and perhaps evokes more affection in visitors than any other Mesoamerican ruin.