The present work contains a report on the application of the most appropriate survey method for Bauforschung, called true-to-form survey, applied to the medieval and Renaissance building remains identified during the wall research from 2014-2017 in the wing “E” of the Princely Palace in Alba Iulia (eastern courtyards). In some written sources from the 17^th-18^th centuries, they were mentioned as “Provost’s Gate”. By recording the existing state of various discoveries by precise measurement (as stones and bricks, plaster and white-washed surfaces, clefts crumbling, mechanical damage and the visible marks of stone dressing tools and corrections, tile, iron and wood remains), we provided a visual tool of determining the construction and decoration stages, the moments of destruction and the repair stages.