April 5 is National Deep Dish Pizza Day and several Chicago pizza parlors are serving ... from the original deep dish spot, Pizzeria UNO. Deep dish was invented at Pizzeria UNO in 1943, and ...

Click HERE to see participating Pizzeria Uno locations and how to take advantage of the deal. Also, Rance’s Chicago Pizza is giving away a $50 gift card in honor of National Deep Dish Pizza Day.