The book takes a heritage approach to the Historic Centre of the city of Porto Nacional-TO. The study was carried out through oral interviews and questionnaires applied to tourists and residents of the city. The questions were directly linked to the existence of cultural tourism in the city and the discourse present in the heritage process. One of the main objectives is to discuss the development of cultural tourism in the city in order to strengthen tourist activity and the perception of residents in the historic centre's listing area regarding the heritage process, based on the formal documents that make up the Historic Centre Listing Minutes and the Listing Dossier. There are many reasons why it is considered one of the most representative cities in the state. Another important fact was its national recognition as a Tocantins heritage site in 2008. It was the second city to be listed in the state and the first in Tocantins. The listing of the Historic Centre of Porto Nacional-TO came with the aim of consolidating and establishing the identity, values, customs and recognition of its own history among the people of Porto.