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thai dipllet coverThe Corts Foundation is pleased to announce that the publication called “The Diplomatic Correspondence between the Kingdom of Siam and the Castle of Batavia during the 17th and 18th century” is translated and published in the Thai language. By translating original Dutch correspondence into English, Indonesian and now Thai, this unique correspondence becomes more accessible to historians worldwide, and especially also now in Thailand.

The important archival discovery of hundreds of diplomatic letters in the archives of the Arsip Nasional Republik Indonesia (ANRI) led to a project to highlight a few of these letters in particular. This treasure trove of unique correspondence between the Royal Court in Ayutthaya and Batavia Castle show the cultural heritage and the economic history of Southeast Asia. It is a rich source for the maritime history of Asia, as it specifies the old inter-Asian trade network and the close ties between kingdoms in the region.

The diplomatic letters are preserved in the archives of the Dutch East India Company (VOC) that were granted the status of UNESCO Memory of the World in 2004. They have a protected status and are regarded an important written source of global history. The correspondence is included in the archival series called ‘the Daily Journals of Batavia Castle’ (1624-1807) and are part of digitalized archives that can be accessed online at: .

All three versions of the Diplomatic letters publication can be found here:
[Thai language version >>]  [English version >>]  [Indonesian version >>]


This project has been made possible by The Corts Foundation in collaboration with ANRI and the Chulalongkorn University in Bangkok, and with financial support of the Royal Dutch Embassy in Bangkok.

BookCoverOn 24 September 2018, the Corts Foundation concluded her second Senshi Sōsho project with the publication of volume 26 of the Senshi Sōsho series by Leiden University Press, both in print and Open Access, titled "The Operations of the Navy in the Dutch East Indies and the Bay of Bengal". The presentation was held in the Great Auditorium of Leiden University with guests anrepresentatives from several countries, in particular Japan, Indonesia, USA and the Netherlands.

The publication is available at:
The Leiden University Repository

[Download PDF >>] [Order a copy >>]

The publication concerns the translation from Japanese into English of the operations of the Japanese Imperial Navy during the invasion of the Dutch East Indies at the start of the second world war. The book presents new insights in these operations, in particular the operations in the Java Sea on 27 and 28 February 1942, when an allied fleet under the command of Rear Admiral Karel Doorman was defeated with a large loss of life. 

Dr. Willem Remmelink, as final editor, was responsible for final edition and translation, assisted by an advisory board of Japanese and Dutch experts.
On 24 September 2018, the president of the Corts Foundation, Mr. Egbert Jacobs, presented the first copy to Prof. Dr. Rutgers, Dean of the Faculty of Humanities of Leiden University, Mr. Hiroshi Inomata, Ambassador of Japan, and Mr. Theo Doorman, son of the late Rear Admiral Karel Doorman. Additional copies were presented to Captain Mark A. Imblum, U.S. Navy Defense and Naval Attaché, Mr Din Wahid, the cultural attaché of Indonesia, and Prof. Dr. Ing. Wardiman Djojonegoro, former Secretary of Education of Indonesia.

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lboxdehaanThe archives of the High Government of Batavia from the 17th and 18th century has been digitized for an important part. The last few years The Corts Foundation and Arsip Nasional Republik Indonesia published more than a million scans of archival documents on the Indonesian website . 
The closing episide of this collaboration is the recent online publication of 1175 maps and their data. Mostly land surveying maps of Batavia and their surrounding lands provide insight into the use of land and division of plots at the time.

The collection has been formed by the government archivist de Haan, who extracted the maps from the archive and put them in a separate archive collection. This collection is now published and made searchable with the descriptions that were created bij de Haan himself at the beginning of the 20th century.

The collectie can be found at: ANRI collectie de Haan 


The Operations of the Navy in the Dutch East Indies and the Bay of Bengal

Remmelink cover The Operations

Between 1966 and 1980, the War History Office of the National Defense College of Japan published the 102-volume Senshi Sōsho (War History Series). These volumes give a detailed account of the operations of the Imperial Japanese Army and Imperial Japanese Navy during the Second World War. The Operations of the Navy in the Dutch East Indies and the Bay of Bengal, volume 26 of the series, describes the Japanese Navy’s role in the campaign to gain control over the Indonesian archipelago. It includes, among others, the first, complete Japanese analysis of the Battle of the Java Sea, a much-debated battle that ended disastrously for the Allies and opened the way to Java for the Japanese.

The Corts Foundation (“TCF”, ) aims to preserve and open up historical sources concerning the Dutch presence in East and Southeast Asia and make them available to researchers and the general public. Its main projects concern the digital long term preservation of 1.1 million manuscripts archival concerning the Dutch East India Company (VOC) held at the National Archives of Indonesia (ANRI), and the translation into English of several volumes of the Senshi Sōsho series concerning the Japanese invasion of the former Dutch East Indies.

After publishing in 2015 to national and international acclaim The Invasion of the Dutch East Indies (Vol. 3 of the Senshi Sōsho series), the Corts Foundation will present on Monday 24 September 2018 at 15.00, The Operations of the Navy in the Dutch East Indies and the Bay of Bengal. To register for this presentation at the Groot Auditorium of Leiden University, Rapenburg 73, please reply to: This email address is being protected from spambots. You need JavaScript enabled to view it. .

During the presentation, Dr. Anita van Dissel, Associate Professor Maritime History, Leiden University, Vice Admiral (rtd) Matthieu Borsboom, Former Commander Royal Netherlands Navy, and Dr. Willem Remmelink, editor and translator of the volume, will give short presentations. The president of the Corts Foundation will present the first copies to prof. Dr. M. R. Rutgers, Dean of the Faculty of Humanities, Leiden University, and to Mr. Th. W.R. Doorman, son of Rear Admiral Karel Doorman, commander of the Allied Fleet during the Battle of the Java Sea.

The publication of this volume was made possible by the financial support of not only the Corts Foundation, but also the Isaac Alfred Ailion Foundation, the Suntory Foundation, the Gravin van Bylandt Stichting, the Netherlands Institute of Military History (NIMH), the Samenwerkende Maritieme Fondsen (i.e. Vaderlandsch Fonds ter aanmoediging van ’s-Lands Zeedienst, Directie der Oostersche Handel en Reederijen, and the Vereeniging de Prins Hendrik Stichting).

The Publisher is Leiden University Press.

For now: “SAVE THE DATE”.

Signed, Egbert Jacobs
President The Corts Foundation



The Corts Foundation

is a Dutch non profit organization that uses the legacy of Kees Corts to perform history and archive projects concerning the former Dutch Indies, especially the period of the Dutch East India company, and end of the colonial period during World War II.





Jakarta, Indonesia
Bangkok, Thailand


In particular:
Christiaan G. van Anrooij Fonds
 Engelbert van Bevervoorde-Van Heyst Fonds



In particular:
Isaac Alfred Ailion Foundation







Arsip Nasional Republik Indonesia





National Institute for Military History 





The Corts Foundation provides access to the content of this website, its data sets and owned publications under the creative commons licence.



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by 24 Dec. 2013