Piritta Convent, or St Bridget's Convent, was a convent situated near Tallinn that was first founded in 1407 as a Bridgettine order of nuns. Russian soldiers destroyed the original Piritta Convent in 1577, but several large conservation efforts have been undertaken on the site, and the edifice, walls, and cellars of the convent's main building as well as its cemetery have been preserved to this day.
The convent features as an important location in Hargla's novel Apothecary Melchior and the Strangler of Piritta. In the book, Melchior is called to the convent, where a nun has been strangled to death.
The plot follows both the series of events that stem from this tragedy and the history of the Piritta Convent and its monastic life, which is described with an incredible attention to detail.