The National and University Library in Zagreb (Library) established the Croatian Web Archive (HAW) in 2004 in collaboration with the University of Zagreb Computing Centre (Srce). The objective of the HAW is to collect, preserve and provide access to web resources that are considered an important part of Croatian cultural heritage. This paper presents the Library’s practice in archiving Croatian web resources. Croatian Web Archive started with a selective approach of collecting web resources. In order to enlarge and improve the national collection of archived resources, in 2011 the National and University Library in Zagreb decided to undertake the whole national domain harvesting. In addition, thematic harvestings focusing on particular subjects or events (e.g. national elections, sport events or natural disasters, etc.) were conducted as part of the HAW’s activities.