The Last Judgment Triptych by Hieronymus Bosch (c. 1450/55?1516) is an art historical masterpiece of Dutch painting from around 1500. This altarpiece, with its central panel and two wings, is the second-largest work by Bosch and is the heart of the Paintings Gallery of the Academy of Fine Arts Vienna. It was bequeathed to the academy by Count Lamberg-Sprinzenstein in 1822 and, like the entire collection of the Paintings Gallery, is the property of the Republic of Austria.In the summer of 2017, five colleagues from the Bosch Research and Conservation Project, Luuk Hoogstede, Matthijs Ilsink, Rik Klein Gotink, Jos Koldeweij, and Ron Spronk, were invited to examine the altarpiece. During the eleven days they spent inspecting the work, which was financed by Het Noordbrabants Museum in ?s-Hertogenbosch, they carried out extensive photographic documentation in visible light and infrared, and infrared reflectography. The altarpiece was subjected to an exhaustive technical analysis.During a second technical examination, supported by the Jheronimus Bosch Art Centre ?s-Hertogenbosch, colleagues from the University of Antwerp led by Geert Van der Snickt carried out Macro-XRF scans of the entire altarpiece. The initial results were published in February 2018 in Burlington Magazine. All the images will soon be available online to researchers and the interested public. They form the basis of the presentations and discussions at the first international, interdisciplinary conference centred around Bosch?s Last Judgment Triptych.