in English In this thesis, I analyse Council regulation (EC) No 1346/2000 of 29 May 2000 on insolvency proceedings and its practical effects in EU member states' bankruptcy proceedings. The regulation creates a European insolvency law which is aimed at proper functioning of the internal market. The market requires efficient and effective cross-border insolvency proceedings in order to protect creditors. I review interpretations of the principle of controlled universality, Lex fori concursus, recognition of insolvency proceedings, and cooperation of liquidators whose function is to administer or liquidate assets located in various member states. I also examine the process of launching primary and secondary proceedings in relation to the debt...