7 is an 80-foot (24-metre) high sculpture built by American sculptor Richard Serra and located in the Museum of Islamic Art Park, in Doha, Qatar.

[1] Constructed from seven steel plates arranged in a heptagonal shape, the work celebrates the scientific and spiritual significance of the number seven in Islamic culture.

[3] Finally, the revised plan involved seven plates of German-made Cor-ten steel assembled in a heptagonal shape and stretching 80 feet (24 meters) in the air.

Richard Serra also found inspiration in the Quran's repeated use of the number seven and the fact that Persian mathematician and astronomer Abu Sahl al-Quhi was the first person to build a seven-sided heptagonal shape.

Taking more than one million man-hours to construct,[citation needed] the sculpture stands on a small plaza 250 feet (76 metres) from the shoreline.

[3] At the ceremony, the Qatar Philharmonic Orchestra performed Hughes de Courson's "The Magic Lutes" and Serra spoke about its origins and his own research.