There are two churches that were destroyed in Cairo that have been rebuilt by the army. However, the Church of St. George in Merinab in Aswan province, which was destroyed by a mob of just over 1,000 people following completion of government-approved renovations, has not been rebuilt. The military government has ordered that local Muslim councils will have to give their approval in addition to that of the national government prior to rebuilding any churches that are damaged or destroyed. They've also made a request that the Muslim community identified as engaging in taking down the buildings be asked to make reparation. In the case of the St. George church, there's been an announcement made by a Sufi that the Muslim community would take action to restore it, but that announcement was made approximately two months ago and no action has taken place.
On November 24th, 2011. See this statement in context.