The  Des Moines City Council tonight is scheduled to discuss a proposed Marriott-branded hotel to be built on a parking lot at the southeast corner of East Grand Avenue and East Fourth Street. The AC Hotel brand hotel is characterized as having a sophisticated European style with an urban feel. Plans call for underground parking and a roof-top bar, reports  Heart of American Group of Moline, Ill., which operates six hotels in Greater Des Moines, is the developer.