Ald. Byron Sigcho-Lopez (25) and Eric Wollan, chief capital assets officer for the Archdiocese of Chicago, speak during a committee meeting on Tuesday.

Aldermen on Tuesday supported a colleague’s proposal to downzone a shuttered Pilsen church as a way to slow any proposed redevelopment despite warnings from the city’s law department and the Archdiocese of Chicago that the move could invite a lawsuit against the city.