Victorian aspirations for respectability, formality, and materialism were compounded in Sydney by colonial yearning for respect, which in architecture resulted in the copying of imported styles, mostly from Great Britain. New wealth and rapid increase in population came with the 1850s gold rush. A new middle class emerged who wanted homes, cities and public buildings that matched their new wealth and social status and construction of high quality buildings such as churches, commercial and public buildings, and ostentatious houses of the wealthy boomed. On the other hand, housing for the working and lower middle class remained substandard and the prevalence of unhygienic and slum conditions grew.