Ton Cremers has been active in over 450 museums etc., in several European and African countries, such as Zimbabwe where he audited the security and safety of all national museums, national archives, and national galleries. Mr. Cremers  has published numerous articles in international magazines, and was the co-developer of a self-audit software tool with which museums are able to investigate their security and safety. Thus far Cremers is the first non-American to have received the prestigious Burke Award for the protection of cultural property.  His publication about emergency management in museums is a standard in the Dutch language world. At the moment Cremers is working on a new initiative to build a museum in Athens, Greece and is active in 17 museums on six islands in the Dutch Caribbean, teaching and training museum workers.

AUSA Levin pioneered the use of federal forfeiture laws to recover and return stolen art and cultural heritage property. The SDNY Asset Forfeiture Unit has initiated dozens of proceedings under the forfeiture laws -- seizing and returning artwork and cultural property to the persons and nations who rightfully own them.  Notable examples include the forfeiture and repatriation of stolen paintings by Lavinia Fontana, Jean Michel Basquiat, Roy Lichtenstein, Serge Poliakoff, Anton Graff and Winslow Homer; drawings by Rembrandt and Duhrer; an Etruscan bronze statute dated circa 490 B.C.; an antique gold platter dated circa 450 B.C.; a rare Mexican manuscript; a medieval carved wood panel which was originally inside the historic Great Mosque in Dvrigi; an Ancient Hebrew Bible owned by the Jewish Community of Vienna and stolen during the Holocaust and most recently, a Tyrannosaurus Bataar skeleton looted from the Gobi desert in Mongolia.

As her early career progressed Blanca Niño Norton became the Vice President of the International Committee of CIAV within ICOMOS and worked on the international charter for its preservation.   During the early eighties she served to create ICOMOS Guatemala.

Blanca Niño Norton became motivated in this field having attended a private party once in Northern Italy where the owner of the house was proud of the stolen part of a column he had in his living room. It was a Guatemalan piece and she felt as if the object was stolen directly from her. Strongly motivated Blanca Niño Norton started working against illicit traffic of cultural property in 2000 and received a grant from the Getty Conservation Institute as a guest scholar. Since then she has also participated in the creation of the office of International Cooperation in the Ministry of Culture in Guatemala and created the office Against Illicit Traffic with the direct support of the Guatemala ministry.  This office was established to enhance communication at the ministry between Guatemalan Customs, the FBI, ICE, the Carabinieri TPC, and Scotland Yard.  In this capacity, she served as principle advisor for the Guatemalan Minister of Culture. In furtherance of that Blanca Niño Norton participated at the international meeting of UNESCO in Cambodia on the convention against illicit traffic of cultural property.  During this time Guatemala signed agreements with UNIDROIT, and the second protocol of Haya; becoming the first country in the region to have signed all of the international cooperation agreements.

Among many cases, he considers most memorable the raids at the summer residence of Dr. Marion True (former curator of antiquities at the Getty Museum) and at the premises of the top illicit antiquities dealers in the world, Robin Symes-Christos Michaelides, in the Cyclades, where the famous archive was discovered.  Over the last five years (2007-present), Tsirogiannis has been identifying looted and ‘toxic’ antiquities at the most prominent auction houses (e.g., Christie’s, Sotheby’s and Bonhams) and galleries (e.g., “Royal-Athena Galleries”), as part of a project with the renowned academics Professor David Gill (University Campus Suffolk) and Dr Christopher Chippindale (University of Cambridge). Some of the results of his research have been already demonstrated in The Journal of Art Crime (“Polaroids from the Medici Dossier: Continued Sightings on the Market”, 2011:27-33, with Professor David Gill). This part of his research has contributed to the withdrawal of antiquities (e.g., Bonhams case, April 2010) and to the disclosure of many scandals in the field (e.g., Christie’s June 2010, April 2011, December 2011). Tsirogiannis’ primary aim is to notify governments to retrieve their stolen cultural property and to raise public awareness regarding antiquities trafficking, through media coverage of these cases.