Galanakis has called Rhousopoulos "the most important Greek collector and dealer between the 1860s and 1890s". In 1873, his collection was described by the German scholar
Friedrich Wieseler as among the most remarkable in Greece, second only to that of the Russian consul-general
Peter Alexandrovich Saburov – which, according to the archaeological historian Angeliki Kokkou, "exceeded the limits and possibilities of a private collection". Rhousopoulos was particularly noted for his
numismatic collection of ancient coins, which numbered over 6,000 objects by 1874. Saburov moved his collection to Berlin in 1880, and had sold it by 1884; in 1885, the Austrian consul in
Corfu,
Alexander von Warsberg, described Rhousopoulos's collection as the richest in Athens.
Antiquities dealership n excavated in Athens, sold by Rhousopoulos to
Samuel G. Ward in 1874, who donated it to the
Metropolitan Museum of ArtRhousopoulos was registered as an art dealer until 1893, though it is unclear when he began to practise. By the early 1870s, his collection included 3,000
Neolithic stone tools, including two complete
stone axes. Between 1873 and 1874, Rhousopoulos unsuccessfully tried to sell his stone artefacts for £120 () to
George Rolleston, professor of
anatomy and
physiology at
Oxford University. Rolleston did, however, purchase an assemblage of bones and artefacts from Rhousopoulos in 1871, paying a total of 475
francs (around £19, ). The assemblage included seven ancient skulls, which Rolleston wanted for his
phrenological research into the ancestral links between the modern and ancient populations of Greece. Rolleston ordered another skull from Rhousopoulos in 1873, and donated all eight to Oxford University's
Ashmolean Museum in 1874. Between these two purchases, Rhousopoulos and Rolleston maintained what Galanakis has called "an amicable correspondence". Rolleston travelled to Athens to view Rhousopoulos's antiquities in his home, and Rhousopoulos travelled to Oxford to visit Rolleston in his. Rhousopoulos's collection and dealership made him a fixture of Athenian high society. An 1884 guidebook to Athens, produced by the British publisher
John Murray, listed Rhousopoulos's collection as a must-see for archaeologically minded visitors to Athens. Rhousopoulos opened his house to invited viewers between 2pm and 5pm each day, and offered any item for sale, though commentators noted that his prices were considerably higher than those charged by other dealers in Athens, London and Paris. His home was often visited by high-status foreign travellers, including Emperor
Pedro II of Brazil in 1876 and
Empress Elisabeth of Austria in 1891. Rhousopoulos sold several items to major European and American museums, including London's
British Museum. In the early 1870s, he sold sixty-two gems, which he identified as "Graeco-
Phoenician", for £240 () to
Charles Newton, then keeper of the museum's Greek and Roman antiquities. Later, in 1884, he sold four
Tanagra figurines to the museum for a total of £760 (), two of which were later found to be
forgeries. The following year, having spent two years negotiating with Rhousopoulos over its price, the museum bought from him a mirror with a scene of the goddess
Nike sacrificing a bull, paying 80,000 francs (around £320, ). He may have played a significant role in the trade in ancient (voting-plates), of which only a handful have survived to modern times. On , he purchased one such that had been illegally excavated from a tomb at Profitis Ilias, near the
Panathenaic Stadium: Galanakis has suggested that Rhousopoulos may have been involved in the sale of many other now found in European museum collections. Rhousopoulos is the only Athenian art dealer who can be definitively placed as supplying Cretan
seal-stones to Arthur Evans, keeper of the Ashmolean Museum, who collected these objects as part of his early studies into the
Minoan writing systems later known as
Cretan hieroglyphs and
Linear A. Galanakis has suggested that Evans may have purchased further stones from Jean Lambros, a rival dealer to Rhousopoulos. In 1888, Rhousopoulos sold twenty-one vases,
terracotta statues and bronze statues to the American philanthropist
Jane Stanford, which would form part of the early collection of the
Stanford University Museum of Art.
Sale of Rhousopoulos's antiquities Rhousopoulos died in Athens on . His numismatic collection, described in 2008 by the numismatist Alan S. Walker as "truly encyclopaedic", was sold in 1905 by the Munich auctioneer Jacob Hirsch. Hirsch divided the collection into 4,627 individual lots, producing what Walker describes as "the largest and best illustrated auction catalogue to have appeared up to that time" to accompany the auction. Though Hirsch did not name Rhousopoulos as the previous owner of the coins, his identity was an open secret among many of the buyers. Other objects from Rhousopoulos's collection were purchased by collectors and museums around the world, including several
potsherds – of minimal commercial value – which are, , held by the of
Heidelberg University. == Antiquities crime ==