In 1573, Ortelius published seventeen supplementary maps under the title "Additamentum Theatri Orbis Terrarum". Four more Additamenta were to follow, the last one appearing in 1597. He also had a keen interest and formed a fine collection of coins, medals and antiques, and this resulted in the book (also in 1573, published by Philippe Galle of Antwerp) "Deorum dearumque capita ... ex Museo Ortelii" ("Heads of the gods and goddesses... from the Ortelius Museum"); reprinted in 1582, 1602, 1612, 1680, 1683 and finally in 1699 by Gronovius, "Thesaurus Graecarum Antiquitatum" ("Treasury of Greek Antiquities", vol. vii).