The Roman Lapidary, set up en plen air in the City Museum's courtyard, collects all the stone inscriptions of the Roman period. 
On display architectural pieces too, such as small cinerary urns. 
You can read one of the oldest inscription on Ovii's funeral monument (I sec. B.C.); it is remarkable that concerning Rimini's paving by Gaio Cesare (he died on 5 A.C.)or that dating back to the second century A.C. 
At the Museum's ground-floor there are also statues, earthenware and inscribed ritual bowls. 

For more information about the Lapidary see the book "Rimini antica" 
or "Il Lapidario romano", by Angela Donati, Comune di Rimini 1981 (collana Musei Guide, 1). 
Quite interesting is also "Il lapidario romano. Origini di una città di frontiera fra culti commerci e vita quotidiana", Raffaelli Editore 1998 (I quaderni del Portico, 2).