 Complete the following phrase:  Four periods are recognised in Pakistani architecture: pre-Islamic, Islamic, colonial, and post-colonial. With the beginning of the Indus civilization around the middle of the 3rd millennium BCE, an advanced urban culture developed for the first time in the region, with large buildings, some of which survive to this day. Mohenjo Daro, Harappa, and Kot Diji are among the pre-Islamic settlements that are now tourist attractions. The rise of Buddhism and the influence of 