Tav?anl? Höyük is situated approximately 2 km from Tav?anl? District of Kütahya Province, and in the central part of the Tav?anl? Plain. The main objective of the Tav?anl? Höyük survey is to shed light onto the transition between the end of the 3rd Millennium BC and the 2nd Millennium BC. The purpose of the geo-archaeological research around the Tav?anl? Höyük was to reveal the influential factors in selection of the spot for founding the mound and the environmental changes that took place around the mound in time and space. For this purpose, vibracorings were done at three points on a line stretching from the alluvial fillings left by Orhaneli Stream flowing in the east to the mound. The preliminary results of our research seem eye-opener for in two ways. It revealed environmental conditions of Tav?anl? Höyük but also confirmed that the findspot is a prominent Bronze Age city in Western Anatolia. The settlement is likely to have been established as a city for the supply of natural resources around and transfer within the framework of the trade network.