recovering old Polish coats of arms. His work was continued by Professor , who finally published an armorial of original Polish coats of arms. The ancient Pałuki family coat of arms was visually close to the Topór coat of arms, and in time a similar coat was assumed by Clan Topór. As the Ostoja coat of arms evolved, the dragon was replaced by feathers and the cross by the sword, followed by other changes between ancient and modern versions. Many Polish coats of arms feature so-called variations, which are particular to Polish heraldry. In many cases, variations are simple errors, sometimes the family wished to make a distinction within the clan and in other cases coats have been called variations of a particular family's coat just because they look similar, which all together create a unique heraldic clan organisation in Poland. This is presented in the second part of the gallery, which shows many different variations of the Ostoja coat of arms. None of the variations above have anything in common with Ostoja, they just look similar. Starting with proto-arms and families like Odrowąż being the House of Odrowąż, Polish family names were appended in many cases with -cki or -ski in reference to the name of their properties; for example, if a person named Chełmski acquired the town of Poniec, he would change his surname to Poniecki. Furthermore, a Jerzykowski (de Jerzykowo) that owned the property of Baranowo changed his surname to Baranowski (de Baranowo) and a Baranowski that owned the property of Chrzastowo change the surname to Chrzastowski (de Chrzastowo). A family became a clan or "heraldic family" using the same coat of arms. Later, when clans adopted several families, they formed heraldic clans, families using the same arms, in many cases defending clan politics but not necessarily blood related to each other. Peculiarities Although the Polish heraldic system evolved under the influence of German heraldry, there are many notable differences. The most striking peculiarity of the system is that a coat of arms does not belong to a single family. A number of unrelated families (sometimes hundreds of them), usually with a number of different family names, may use the same, undifferenced coat of arms, and each coat of arms has its own name. The total number of coats of arms in this system was relatively low – ca. 160 (Piekosiński) in the late Middle Ages. The