A nonprofit group will renovate a landmark 1867 mansion in Providence after winning $197,000 in state historic tax credits. Community Works Rhode Island intends to rehabilitate the Kendrick-Prentice-Tirocchi House on the city’s west side and convert it into three affordable apartments and a large owner’s unit. The mansion is also known as the wedding-cake house. The Providence Journal reported that the project will cost nearly $1 million. Community Works bought the property for $210,000 in 2011 after a foreclosure and plans to put it on the market for $699,000 after the renovations.