Over the millennia of its development, Hinduism has adopted several iconic symbols, forming part of Hindu iconography, that are imbued with spiritual meaning based on either the scriptures or cultural traditions. The exact significance accorded to any of the icons varies with region, period and denomination of the followers. Over time some of the symbols, for instance the Swastika has come to have wider association while others like Om are recognized as unique representations of Hinduism. Other aspects of Hindu iconography are covered by the terms murti, for icons and mudra for gestures and positions of the hands and body. List of materials used in Hinduism Hindu sacraments are physical pieces of that help objects or markings that are considered sacred and used as a sign of devotion by the followers of Sanathana Dharma (Hinduism). These are often objects associated with a puja (prayer) or religious ceremony. Murtis (Sanskrit: मूर्ति) are sacred works of art, primarily in the form of statues and paintings, which serve as representations of divinity, for use during religious devotion. Murtis are a huge part of contemporary mainstream Hindu culture and often hold significant sentimental value in many Hindu homes. Many believe that murtis are vessels that capture the essence of gods, which helps the devotees focus and concentrate during prayers. Although there are many Hindu gods, the most common murtis are depictions of Ganesha, Hanuman, Shiva, and Mother Lakshmi. Each god appeals to certain aspects of human life, for example Lakshmi is the goddess of fortune and the embodiment of love, while Hanuman is worshiped for strength and loyalty. Murtis are physical references to God and allow Hindus to pray more effectively, while regulating the religious market The tilaka (or tilak) is a mark worn on the forehead or other parts of the body as a sign of spiritual devotion. Hindus may wear a tilaka regularly or especially on religious occasions. The shape of the tilaka is often an indicator of devotion to a certain deity.