 His work, focused entirely on religious themes (like George Herbert's), was strongly influenced by Italian poetry, especially by "Rime Spirituali" by Gabriele Fiamma.One of the founding fathers of Polish lyric poetry, Grabowiecki was one of the first poets to write sonnets in Polish.Thus he holds a position comparable to Thomas Wyatt, Henry Howard, Earl of Surrey and Portuguese poet Francisco de Sá de Miranda, who introduced the sonnet into their native literatures.