Abstract. There are three very important ques- tions regarding Piast architecture around 1000 AD. The first is the origin of the architectural shapes used. The second is the relationship be- tween architecture and liturgy. The third is the research of mechanisms of creating a Christian state, based on the collaboration between the ruler and the church and its missionaries. Com- parative studies between Central Europe and Scandinavia in the field of monumental archi- tecture are suggested. T he origin of the early stone architecture in Poland is closely associated with the creation of the Polish state, and with the conversion to Christianity. Mieszko – the first ruler from the local Piast dynasty – fin- ished the territories’ unification process and the formation of the single state, with its centre around strongholds in Poznan, Gniezno, Lednica and Giecz in the so called Greater Poland (fig. 1). According to the re- sults of the latest archaeological investiga- tions, a complex, forceful reorganization of the centres took place before the year 966 – the year of Mieszko’s baptism. We may cautiously presume it was a carefully considered, well studied and am- bitious plan of Mieszko’s predecessor. Mieszko took on this political project and completed it with his own baptism. Around this time, the Christian dignitaries arrived in Poland with their followers. Having the proper know-how, they brought the archi- tectural ideas with them and hosted profes- sional builders’ workshops. I have to point out that there are a very limited number of credible historical sources describing the process of creating the new Christian state and the church or- ganization. We have not got any written in- formation pertaining to the setting the new Christian buildings in Poznan, Gniezno, Lednica Island, Giecz and Wawel Hill in Krakow. Studying the archaeological mate- rial along with artistic sources definitely give us more information. These sources should be treated as equivalent to the writ- ten sources. Amongst the abundant archae- ological material, there is some evidence to be had relating to the monumental stone ar- chitecture in Poznan, Gniezno, Lednica Is- land, Giecz and Wawel Hill in Krakow, SITUNE DEI 2009 21 Some questions surrounding monumental architecture of the Early Medieval Poland around the year 1000 Aneta Bukowska