Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Roland Dalhauser (born 12 June 1958 in Birsfelden, Basel-Country) is a retired high jumper from Switzerland. He won three medals at the European Indoor Championships and became Swiss champion nine times.His personal best jump, which is also the Swiss record, is 2.31 metres.He jumped 2.32 metres on the indoor track. Birsfelden is a municipality in the district of Arlesheim in the canton of Basel-Country in Switzerland.Birsfelden is first mentioned in 1274 as minor Rinvelden. Around 1500 it was first mentioned as Birsfeld