The conservation of old Sanaa is a major cultural heritage initiative that began in the 1980's under the auspices of UNESCO; it continues today, led by local agencies and actors. In contrast to other parts of the world where conservation was introduced at a later date to remediate the effects of modernization, in Yemen the two processes have been more or less concurrent. This has resulted in a paradox: unlike many other countries in the Middle East that abandoned traditional construction practices long ago, in Yemen these practices have not died out. Builders and craftsmen still work in...