The research aims to unravel the liturgical setting of Karaite liturgical poems before and simultaneously with the redaction of the Karaite prayer book (i.e. twelfth and thirteenth centuries). The main corpus consists of a poetical cycle of liturgical poems composed by the twelfth-century Egyptian Karaite poet Moses ben Abraham Dar‛ī. These poems, bound to the liturgical cycle of weekly Torah reading on the Sabbath, will be critically edited and analyzed as early examples of inserting poetry and Andalusian poetical norms into the Karaite liturgy. Their liturgical setting will be reconstructed and then compared to that of later Karaite liturgical poems composed by Aaron ben Joseph “the Elder”, who compiled the Karaite prayer book while living in Constantinople in the late thirteenth century. This prayer book has been regarded as instrumental in introducing liturgical poetry into Karaite worship and has influenced Karaite prayer services ever since. Aaron ben Joseph was well versed in medieval Rabbanite literature and introduced – in addition to his own poetry – Andalusian Rabbanite liturgical poetry into the Karaite prayer book. The analysis of the integration of these Andalusian Rabbanite liturgical poems in the Karaite prayer book may provide new insights into the cultural and literary transfer between different religious groups.