Australian residential architectural styles have evolved significantly over time, from the early days of structures made from relatively cheap and imported corrugated iron (which can still be seen in the roofing of historic homes) to more sophisticated styles borrowed from other countries, such as the Victorian style from the United Kingdom, the Georgian style from North America and Europe and the Californian bungalow from the United States. A common feature of the Australian home is the use of fencing in front gardens, also common in both the UK and the US.