In the years 2004–2007 a number of interesting discoveries of Roman coins occurred in the basin of the river Bzura in central Poland. Among them the most notable are three hoards of denarii: from Krzyżanówek, Sobota and the region of Sochaczew. The original size of these assemblages is hard to estimate. With a probability bordering on certainty we may assume that only a part of the coins scattered by ploughing was recovered. Coins from the three hoards are confined to the period between the death of Nero (54–68 AD) and the first years of the reign of Septimius Severus (193–211 AD). Only a supposed Republican coin belonging to one of the hoards falls outside these chronological limits. Much more interesting than the content of the hoards is what we may surmise to have been the manner of their deposition. As may be concluded from what in most cases are rather laconic descriptions of the place of discovery of the coins, they were discovered not far from the river. Moreover, the fact that they had been scattered by ploughing suggests that originally they rested at a relatively shallow depth in the ground. From the described circumstances the recently discovered hoards are all similar to the largest deposit recorded on the river Bzura so far — the hoard from Drzewicz Nowy, described in detail and analysed in a monograph of A. Krzyżanowska (1976). The vestigial character of the data on the new hoards makes it possible only to propose a very cautious hypothesis as to the occurrence in the basin of the Bzura of a whole series of hoards of ‘Drzewicz type’, probably deposited for votive reasons. In the same area 54 silver and bronze Roman coins from 33 recent small finds were also registered. Most of them were denarii of the first and second centuries, including five subaerati (1 certain and 4 supposed). Only one of the recently found denarii had been struck in the third century. The rest of the newly discovered coins were two sestertii of the second and third centuries and two bronzes of the fourth century. On the basis of various premises (eg. coin finds from localities known through archaeological excavations) it is possible to assume that sizable numbers of these coins were discovered at a specific archaeological site and could be regarded as a settlement or grave find. The basin of the river Bzura, heavily populated during the Roman Period, abounds in finds of Roman coins and has yielded one of the largest concentration of recorded Roman coin finds in Poland.

In 2007, an excavation was undertaken in the supposed place of deposit of the Roman hoard of denarii in the village of Podzamcze (central Poland). In the older literature, the find used to be located in nearby Maciejowice. Coins found in Podzamcze in recent years, and the analysis of the information obtained so far concerning this discovery, allow the assumption that it was Podzamcze where the hoard of denarii discovered in 1875 was found. During the excavation three denarii were recovered below the humus layer: one each of Hadrian, Marcus Aurelius and Commodus. On 9 February 2008, the researchers undertook field prospecting again using metal detectors in the area of excavations conducted before, which resulted in recovering a quarter of another denarius of Commodus. The region of the confluence of the Okrzejka and Vistula rivers is relatively abundant in sites from the period of Roman influence. Sites of the Przeworsk culture are represented here, as well as those of the Wielbark culture, which at stage B2/C1a expanded into west Mazovia. Within this small area we find settlements, burial grounds, and also single items, including Roman coins. The coins are represented mostly by denarii from the second century, typical of Poland. However we also find earlier coins here, i.e. from the first century with an undated Republican denarius, as well as later ones, dating from the third century, represented by a follis of Maximianus Herculius (c 296–297?). In the light of the finds made in this area, the region of the confluence of the Okrzejka and Vistula rivers appears as a rather important local settlement center, which was probably connected with the outside world through various kinds of contacts.