Imum Coeli (often abbreviated as IC) is a crucial point in the field of astrology, representing the lowest point in the sky at any given time and location. In Latin, Imum Coeli translates to "bottom of the sky," and it is one of the four cardinal points in a natal chart, alongside the Ascendant, Descendant, and Medium Coeli (MC). In Hebrew, it is known as תחתון השמיים (Tachton HaShamaim). This point is calculated based on the exact time and place of an individual's birth and is considered the cusp of the fourth house in the natal chart. The Imum Coeli is often associated with one's inner world, subconscious, and the roots of one's being, including family, heritage, and personal foundations. In French, it is referred to as le Fond du Ciel, and in Spanish, it is known as el Fondo del Cielo. The interpretation of the Imum Coeli in a natal chart can provide insights into an individual's emotional and psychological foundations, as well as their relationship with their family and cultural background.