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The Action of 28 September 1648

On September the 28th 1648, a flotilla of seven Dutch ships under command of Admiral Witte Corneliszoon de With was raiding along the Brazilian coast, when two Portuguese ships were sighted. Admiral De With quickly moved to attack, steering the flagship Brederode towards the enemy, aided by four other ships. While engaging Nossa Senhorade Rosário, Brederode's rigging got entangled and the Portuguese ship was able to escape.

Rosário's luck was however short-lived. The captains of the fast yacht Utrecht and the Huis van Nassau managed to flank the Portuguese vessel, and prepared to board. In a desperate attempt to avoid capture, the Portuguese set fire to their own ship, hoping to damage the Dutch ships as well. The explosion that followed not only took down the Rosário, along with most of its crew and a group of Portuguese nobles on board for sightseeing, but the Utrecht as well. 400 Portuguese and 150 Dutch sailors lost their lives in the incident.

View on Salvador from the bay as depicted in the atlas by Johannes.


The Utrecht wreck site, lying near Bahía, at a depth of about 20 meters, and some 200 meters from the Nostra Senhorade Rosario, was first officially explored in the years 1981-1982. A contract with the Brazilian Navy granted salvage rights to a Brazilian company named SALVANAV and a Canadian company owned by well-known American treasure hunter and author Robert F. Marx.

Twenty percent of th eartefacts was to be picked by the Navy to illustrate the recently created Navy Museums in Rio de Janeiro and Bahia. The companies operated freely until 1983, when news arrived of an auction of artefacts from shipwrecks held at Christie's in Amsterdam. A set of exceedingly rare Dutch coins, minted in Brazil in 1645 and 1646 sold at the auction were suspected to have been illegally exported against the rules of the contract established with the Brazilian Navy. In consequence, Brazil suspended all contracts and started working on specific legislation to regulate and protect the country's underwater cultural heritage.

Canon of the Utrecht in the Rio de Janeiro Naval Museum.


During a short assessment of the Utrecht's condition in 2007, it was determined that despite all the wreck's recent history, large parts of the ship's hull had been well preserved. This prompted researchers from Texas A&M to catalogue and describe all objects that had been lifted from the wreck over the years during commercial salvage operations.

Utrecht, The

During the dives done after the International Symposium on Maritime Archaeology in the Americas in 2007, Martijn Manders (Dutch Cultural Heritage Agency) identified important hull construction features at the Utrecht wreck site.

The research was expanded upon in December 2012, when an archaeological programme was initiated by the Maritime Programme of the Dutch Cultural Heritage Agency in cooperation with Texas A&M, the University Bahia and The Brazilian Institute for Museums (then IPHAN). The site was mapped and possibilities for conservation were explored, involving local archaeology students. Analysis of the ship construction revealed that Utrechts hull consisted of three layers. While two of such layers were common practice for protection against damage from shipworm, further research will have to reveal the secret behind the third one.

De Utrecht, De Uytrecht

Spelling in Dutch 17th century is diverse and sometimes confusing. Also the fact that there were at the same time in the Dutch Republican navy two ships called the Utrecht.

The one described in this record that sank in 1648. and one other active ship named the Utrecht (also a frigate). This second Utrecht was built in 1638 for the Admiralty of Rotterdam. It measured 100 Rotterdam feet (28.23 meter: the Rotterdam foot measures 0.2823 metres), and had 22 cannon.


Type: Frigat
Built: Amsterdam, 1633
Owner: Admiralty Amsterdam
Dimensions: 120 x 28 x 10,5 vt
Complement: 145 (1648)
Master: Jacob Paulusz. Cort (1648)
Armament: 32

A warship similar to the Utrecht on a (painting by Jacob Geritz Loef, ca. 1650).


Partly salvaged in 1981/82 by SALVANAV under contract of the Brazilian Navy. Some extremely rare golden coins were auctioned at Christie's in Amsterdam. As a consequence salvage operations were stopped and the Brazilian government conducted a new law (1986) in order to protect UCH.

During survey in 2007 it turned out that large parts of the construction were still in situ and future research promising.

From 10-19 December 2012 an archaeological research program was initiated by the Maritime program of the Cultural Heritage Agency of the Netherlands together with Texas A&M, University Bahia and IPHAN. The site is mapped, and data was collected on shipbuilding technique. Archeology students have been trained working on the Utrecht Site.

3d visualisation of the Utrecht wreck site by Kotaro Yamafune (Texas A&M).


  • W.F.G.J. Brouwers, T. Coenen, M.R. Manders, J. Opdebeeck & R. Torres (2016).
    The Utrecht, A shipwreck of the Dutch admiralty in the Baía de Todos os Santos, Brazil.
    Rijksdienst voor het Cultureel Erfgoed.
  • Doedens, A., 2008, Witte de With 1599-1658: wereldwijde strijd op zee in de Gouden Eeuw..
  • The Utrecht, A shipwreck of the Dutch admiralty in the Baía de Todos os Santos, Brazil: its history from battle to archaeological assessment authors: W.F.G.J. Brouwers, T. Coenen, M.R. Manders, J. Opdebeeck & R. Torres (Amersfoort 2015)..

Sunken Treasures


World War II

Dutch Presence in Cuban Waters

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