Why is the Star of David sometimes found on the gates to Hindu temples?

• THE HEXAGRAM (six-pointed star) is one of the earliest symbols and has been found on artefacts that certainly predate its association, Judaism. The hexagram only began to be used in synagogues in the late middle ages; its association with the term "Star of David" probably derives from its use in the Kabalah as the Shield of David, a magical symbol of protection. In this role, the Shield of David was often represented as either a hexagram or a pentagram.

  Mark Cohen, Sheffield.

• THE QUESTIONER may have seen a yantra rather than a star of David, or the star of David may have been suggested by a yantra. Yantras are mystic diagrams used in meditation. They consist of letters and geometric figures and the best known comprises nine interlocking triangles, symbolising the multi-dimensional manifestations of male/female cosmic power known as Shiva-Shakti.

  (Dr) Eleanor Nesbitt, Religions and Education Research Unit, University of Warwick, Coventry

• Since it is generally accepted that the Sanskrit writing system developed out of the early northern semitic writing system (sometimes known as the 'Phoenician' alphabet), it is obvious that there was a good deal of cross-cultural borrowings in ancient times. I don't see why the six-pointed star should not have travelled the same trade routes either east to west or west to east.

  L Rivlin, London