Memorials commemorate people, groups, or events and can include both tangible and intangible forms. Tangible memorials include historic forms such as an obelisk, stele, arch, statue, or a sculptural group as well as conceptual forms such as the eternal flame, the Cross of Sacrifice, the Stone of Remembrance, the Poppy, and tombs of the Unknown. Tangible memorials can also include books and writings as part of those objects of remembrance to be transferred to future posterities. Intangible memorials typically include scholarships, funds, and bursaries established in memory of someone.