The historical city as the sustainable compact city modelSustainability:This complex concept deals mainly with the delicatebalance between inheritance and legacy.Like in domestic economy we can not spend more thanwe earn.But also like in domestic economy we are spending morethan we can, living on credit, hopping that someone willpay our debts in the future. That is not sustainableanymore. Joaquim Flores – Puebla – Mexico – 3-7 October 2001