Poetry's strength is unexpected. It always surprises us, probably because there is lesser and lesser of it around us. It overcomes geographic distance, generational features and language differences.It drags us to a sublime level, since it moves into a space without reference points and crosses the boundaries of what we can see, hear think and imagine. But how it comes that we speak of poetry for a musical artifact?Because Sabir Mateen and Silvia Bolognesi, in "Holidays in Siena", are poets, first of all. Far from a worn out romantic concept (inspiration, destiny...) they create sounds, mix, contrasts, silence spots, that show not only contemporary anxiety but also the joy of playing together.