At university he studied Nordic archaeology with Nils Åberg (sv), whose typological-chronological approach Holmqvist adapted.
On the basis of this study he submitted his dissertation, Kunstprobleme der Merowingerzeit ("Art problems of the Merovingian period"), for graduation on 2 December 1939.
[1] The finds, which early on included a bronze 6th-century Buddha statuette from North India,[2][3] an Irish crosier, and a Coptic ladle, led to two decades of excavations.
[1] These were partially funded through the intervention of King Gustaf VI Adolf, who on 15 June 1965 bestowed upon Holmqvist the title of professor.
[1] Holmqvist led the excavations, which included work by his students and archaeologists such as Valdemars Ginters (lv), until his retirement on 1 January 1975.