J. Lang's scientific contributions

... wt% Ag), which corresponds well with the general trend that during the 5 th -century AD a gradual debasement of silver alloys occurred towards the end of the century (Figure 4) (Horváth et al., 2019;Mozgai et al., 2019b). The beginning of the 5 th century AD is characterised with high-quality silver alloys with low Au, Pb and Zn and varying Bi content similar to late Roman silver alloys (Hughes and Hall, 1979;Lang et al., 1984;Feugère, 1988;Lang, 2002;Cowell and Hook, 2010;Hook and Callewaert, 2013;Doračić et al., 2015;Lang and Hughes, 2016;Greiff, 2017;Mozgai et al., 2017;Vulić et al., 2017;Mozgai et al., IANSA 2021 • XII/1 • 45-67 Viktória Mozgai, Eszter Horváth, Bernadett 2020; Mozgai et al. 2021). In contrast, lower quality silver alloys with high Cu, Pb, Zn and Sn content, reaching even the 1:1 Ag:Cu ratio (Figure 4), are more typical for the end of the 5 th century AD (Horváth et al., 2019;Mozgai et al., 2019b). ...