Jean has painted scenes from all corners of Ireland, but her signature style evolved from architectural impressions of familiar Dublin landmarks and cityscapes - in oil, pen and ink, and watercolour. She has preserved the mood of Old Dublin for posterity in many of her works. Her paintings include views of Howth Harbour, Raheny Village, Trinity College Dublin, the Ha'penny Bridge, Custom House, St Anne's Park, Dublin Bay, O'Connell Street, St Stephen's Green, Clontarf Castle and many more.