Several artifacts, including an anchor, iron nails, cannonballs, and more, are displayed at the Guam Cultural Repository during a press conference on Nov. 26, 2025.

Artifacts from the Spanish treasure galleon Nuestra Señora del Pilar de Zaragosa y Santiago, which sank in the lagoon near Cocos Island in June 1690, are now at the Guam Cultural Repository.

The repository started receiving on Nov. 21 its first galleon-related collection from the University of Guam’s Micronesia Area Research Center, including some 2,000 artifacts.

 

Mike Carson, PhD, professor of archaeology at MARC, reached out to Nicole Delisle Dueñas, archaeological collection lab manager at the repository, about transferring some of MARC’s archaeological collections related to the Marianas region earlier this year, according to Guam Museum curator Michael Bevacqua.

Bevacqua told the Pacific Daily News that Dueñas visited MARC to set up regular transfers of collections, starting with the collection of artifacts from the 1991 recovery efforts of the Nuestra Señora del Pilar, which sunk 335 years ago.

“In 1991, a salvage operation began, seeking to recover the galleon’s lost treasure and any artifacts from the wreck. After a decade of searching, around 2,000 artifacts were found, including cannon balls, iron nails, an anchor, but only a few dozen silver coins,” Bevacqua said in a prior release.

He said this first historic transfer celebrates not only the history, “but also just these artifacts that have been long hidden away in storage rooms, gaining new life, and new educational and exhibit possibilities.”

Gaining insights

As they are kept and studied between the repository and the Guam Museum, Bevacqua and Dueñas are excited to gain new insights into CHamoru-Spanish activities during the wars.

Dueñas said this is the first ever of the galleon-related collections that the Guam Cultural Repository has received since it opened in 2022.

“This was really interesting to bring these collections over, and it has a really interesting history,” Dueñas said. “[During] the Spanish galleon portion of history, Guam was such a major hub in the Acapulco-Manila trade route and seat of the Spanish government in the Marianas, so this [collection] adds new context from the CHamoru perspective.”

Carson added that he was happy to oversee the first transfer from MARC over to the repository.

He also said the artifacts were preserved with the assistance of UOG, which lent its expertise with electrolysis to halt the corrosion of the metal pieces.

“Nobody was doing anything with them, so we’re moving them into the hands of people who are excited and want to learn about them and this interesting time in CHamoru history,” Carson told the PDN. “I’m very happy to officially transfer [them] into the hands of the experts who will be handling the curation and the interface with the public and further research; otherwise, it would be sitting in office with nothing to do with them.”

When displaying some of the artifacts at the repository on Wednesday during a press conference, it was revealed that some pieces collected during the recovery effort were “more modern” than the rest but likely still from the same time period.

Additionally, Carson and Bevacqua said more artifacts from the galleon’s shipwreck were possibly dispersed from the site due to ocean currents and typhoons or were difficult to find or distinguish from other debris dumped in the lagoon by the military during World War II.

“Typically, in shipwrecks, things settle down in the seafloor and are gradually covered up. In this location, you would expect some dispersion naturally with the ocean currents,” Carson said.

 

‘Lost love story’

The 1991 recovery efforts, Bevacqua added, were also primarily focused on finding treasure from the Spanish ship in the form of gold or silver. Very little was found, and the few pieces recovered were later misplaced.

“Silver pieces were supposed to be turned over to the governor’s office, but like your grandfather’s machete, that’s the first thing that gets legs. Even an article written by one of the divers on the salvage operation said they were given the silver pieces, so it’s hard to find out what happened to those,” Bevacqua said.

Due to the lack of “treasure” found, Bevacqua said the Pilar collection is considered a “lost love story (of) the one that got away,” a treasure hunt that bore no fruit.

However, he argues that the collection still holds value and insight into CHamoru history.

“If we want to tell the story from the CHamoru perspective, not from the perspective of treasure hunters or Spanish galleon captives or missionaries, this is important, because we could talk about [how] the CHamorus in their canoes went out to save the Spanish, brought them to shore, and brought their stuff to shore,” Bevacqua said.

He added that the Spanish aboard the galleon were likely thinking about using what they could salvage from the wreckage to go put down the rebel CHamorus in the northern islands.

The pieces themselves would also have been valuable for the CHamorus of that time, who were known to trade for and collect iron and other metals to smelt and convert to traditional tools.

“They weren’t interested in the gold or the silver (and) accounts from other wrecks mention CHamorus tossing aside gold,” Bevacqua said. “CHamorus would have [taken] iron, especially nails and other metals or at least pieces to incorporate into tools. There were people shipwrecked in Guam who knew blacksmithing and some CHamorus who learned. If they gathered enough pieces, they could form simple tools.”

The Hornbostel Collection, for example, whose artifacts are in process of being returned to Guam and other islands, included adze with heads made of metal instead of shell or stone.

Bevacqua said these artifacts were dated to around the Latte Period and are early examples of CHamorus trading for and repurposing metals into traditional tools.

More exhibits

In the future, the repository and museum hope to open several regular exhibits featuring artifacts from the Pilar, Hornbostel, and other collections.

“We want to have more exhibits, more partnerships, more educational opportunities. One of the things we’re hoping to do next year is a regular exhibit [of] treasures from the repository or from the museum, including the archaeology collections [and] whatever is already processed,” Bevacqua said.

Artifacts to be included from the Hornbostel and other collections range from slingstones, human remains, and latte, originally found in Mangilao, Tamuning, and Tumon.

Bevacqua said the residents can expect big exhibits in the museum’s rotating gallery once it completes the transfer of items from storage at its interim repository to the UOG facility.

“It is a great opportunity to go through boxes, check, and rediscover everything,” Bevacqua said. “We’ve collected and found history. Isn’t that wonderful?”