Signboard

One of the most famous inventions of Idus Valey Civilization is the signboard. The Dholavira Signboard, one of the most important finds at Dholavira, was made in one of the side rooms of the northern city gateway. On a massive wooden board, the Harappans had sorted and put chunks of the mineral gypsum to create ten gigantic symbols or characters.

The board eventually collapsed onto itself. The letter arrangement was still there despite the wood's deterioration. The signboard's letters resemble the big bricks that were used to build the adjacent walls. The board that the letters were written on was around 3 m (9.8 ft) long and each sign is roughly 37 cm (15 in) high. With one symbol occurring four times, the inscription is one of the longest in the Indus script, and this, along with its size and public nature, makes it a crucial piece of evidence used by scholars who contend that the Indus script reflects full literacy. This site also has a four-sign inscription with huge letters on sandstone, which is said to be the first one of its kind at any Harappan site.