A survey at Rheinmunster-Schwarzach was carried out during extended research of the medieval monastic complexes of Baden-Wurttenmberg, southern Germany. The excavation of building foundations connected with the church was an aim of the survey. Previous knowledge of the buried remains was based on the results of the few trial pits and a study of written sources. The resistivity method was applied. A preliminary survey using the twin-probe array (1 m spacing between traversing probe, 1 m 2 grid) gave no result. Symmetrical Schlumberger sounding was then carried out with a grid 2X5 Â 2X5 m over an area of 1500 m 2 . Both geoelectrical crosssections and resistivity maps were analysed for 12 different prospecting levels. Such a method of analysis allowed us to trace the remains from different periods: the east wing of the eighth to ninth century cloister and fragments of the seventeenth century complex. The remains are preserved at different depths. During the survey the instrument ARA, which is designed for shallow depth prospecting, was used.

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The early Neolithic rondel is a large curvilinear ditched and palisaded enclosure found in increasing numbers in Central Europe. It has close links with the tells of the Danube region, themselves highly suggestive instruments of the earliest Neolithic. Here the authors extend the distribution of rondels further to the north-east, with the discovery and verification of the first example in Poland. As they point out, it is aerial photography that made this advance possible and we can expect many more discoveries, given appropriate investment in the art.

Marea/Northern Hawwariya is one of the largest and most important archaeological sites dating between the 3rd century BC and the 8th century AD located at Lake Mareotis in northern Egypt. Even though excavations have been carried out since the end of the 1970s, the settlement is still largely unexplored. To rectify this situation, non-invasive research has been carried out on 21.5 ha of the site using a precise positioning system and magnetometer measurements. Exact topographic and magnetic maps were prepared based on the data that were obtained.Simultaneously, verification research were carried out, including archaeological excavations, registering surface findings and satellite image analysis. In the southeastern part of the site, electrical resistivity measurements were taken as well. This approach allowed for the identification of the densely built areas of the Byzantine and Early Islamic town. On the south-western side, some magnetic anomalies were registered, following regular patterns with clear linear borders and surrounded by wetlands without clear signs of habitation. On the northern side, the settlement was limited by an artificial coastline, forming straight waterfronts made of stone blocks. As for the town itself, a 260-m street with adjacent regular built-up areas was discovered. This regularity points to an order of planning, at least for the Byzantine part of the settlement. Recording of large amplitude magnetic anomalies proves the presence of heavily burnt objects. They may be interpreted as remains of kilns, perhaps used to manufacture amphorae, glass vessels and lime. Electrical resistivity measurements in the south-eastern part of the site localized cavities in the natural limestone rock uplift. These may have been rock-cut tombs. Multidisciplinary, non-invasive research in Marea/Northern Hawwariya allowed for the quick generation of new knowledge on the topography of the site, significantly enriching information on its form and the functions of its various parts.

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