There are seven principles or properties that make up a city, production, proximity, These properties account for the existence of cities, that relate to cities of the past and present and future. Need for cities to produce goods and services for their own residents and to be exported beyond their territories to assure the purchase of the goods and services that cannot be procured within their territory. Economic production creates jobs and brings people into the city and it is the main reason for urban growth. Fish, furs and timber were first establishment of merchandise in canada. Cities depend for their natural resources on a territory, i. e ecological footprint. For a city to exist, it must be in a position to export sufficient goods and services to counter- balance its imports. Cities are made of numerous overlapping markets of frequently repeated exchanges, with a predominant structuring role taken by the labour market.