A piece of furniture or a piece of kitchen furniture (10) comprising an openable assembly (1), said openable assembly (1) comprising a first compartment (4) accessible by means of at least one first opening and a second compartment (8) accessible by means of at least one second opening (9); wherein a closing device comprises at least one first closing element (11) and at least one second closing element (12); and wherein said openable assembly (1) comprises at least one seat (16), which at least partially receives both said one first closing element (11) and said one second closing element (12); and wherein, when in said at least one opening position, said first closing element (11) and said second closing element (12) are housed in said one seat (16), and wherein said at least one first closing element (11) and said at least one closing element (12) are housed said seat (16) keep said first compartment (4) accessible; said openable assembly (1) comprises at least one synchronization device, which connects said first closing element (11) and said second closing element (12); and wherein said openable assembly (1) comprises at least one third compartment (32) which communicates with said second compartment (8), so that said third compartment (32) is accessible when said second opening (9) is open.