Ferdinand Bol's preparatory sketch for his celebrated series of portraits of Admiral Michiel de Ruyter was thought lost since WW2, until a sale in early 2021...

A drawing recently offered at an Italian auction house as "school of Pisanello" turns out to be a work of master forger Eric Hebborn

An unattributed drawing raised eyebrows at Bonhams as it sold for over 35 times over its low-estimate. An attribution lost to time or concealed?