In addition to mastery of traditional calligraphy, the art of engraving requires a high degree of virtuosity, since the artist works on a tiny surface area where every curve, every thickness of line counts.

UNESCO: Culture

Rather than placing the calligraphy in the context of street art and design, "we are showing the works as art and sculpture pieces", said Natasha Whiffin, the gallery's manager.

BBC: Calligraphic graffiti in Hong Kong

Any representation of the human form has traditionally been discouraged in Islamic art, helping Arabic calligraphy to thrive in its place.

BBC: The Koran through the ages

As an instrument of calligraphy and painting, the seal is a work of art in itself.

UNESCO: Culture