Dominicus Custos was a Flemish artist, printer and copperplate engraver, who worked in the service of Emperor Rudolph II in Prague.
Dominicus was born in Antwerp, the son of Pieter Balten, and settled in Augsburg as the second husband of the widow of Bartholomäus Kilian, a goldsmith from Silesia and the father of Wolfgang and Lukas Kilian; they were trained by Dominicus in the art of engraving after their father's death. Dominicus was the father of David Custodis, also an Augsburg engraver.
Custos and the humanist Marcus Henning collaborated in producing the work "Tirolensium principum comitum" which appeared in 1599 and depicted 28 Counts of Tyrol from Albert IV to Rudolf II. Custos was responsible for the engravings while Henning took care of the text and eulogies.
Between 1602 and 1604 he published the "Atrium heroicum" in four parts. This was a collection of 171 engraved portraits of rulers, nobles, statesmen, dignitaries, celebrities, military leaders and important businessmen of the 16th century, and was the equivalent of a modern Who's Who. Custos' stepsons, Wolfgang and Lukas assisted in the work, and later his three own sons contributed.