The big gate of Taj Mahal has an inscription that says, "O Soul, thou art at rest," welcoming guests, which means come back to the Lord in harmony with Him and with yourself. Quranic verses have been included in the complex as ornamental components. Arabic inscriptions in black marble adorn the main tomb and the south entryway. The black marble lettering is inlaid into white marble scroll-like borders that frame the architectural features. A significant emphasis on horizontal and vertical strokes combined with sweeping letters in certain areas gives the design an almost grid-like look. The phrase is written in the 'thuluth' script, a calligraphing style that is specifically linked to Amanat Khan, a Persian calligrapher who lived at the Mughal court.