 The city centre became a major centre of transport and commerce, Hunslet and Holbeck became major engineering centres.Armley, Bramley and Kirkstall became milling centres and areas such as Roundhay became middle class suburbs, the building of the Leeds Tramway allowing them better connections with the rest of the city.By the 20th century this social and economic had started to change with the creation of the academic institutions that are known today as the University of Leeds and Leeds Beckett University.