The Trismegistos project is developing tools for the topographical study of Egypt from the 8^th century BC till the 8^th century AD. We are compiling a list of all toponyms known from Egypt in this period, providing for each place the basic information and an elementary bibliography mainly referring to the existing geographical corpora. A first version was published as TOP 2 (<http://www.trismegistos.org/top>), which is constantly updated in the online database (<http://www.trismegistos.org/geo>). Secondly, we are collecting the references to all these toponyms in the Greek, Latin, Demotic and Aramaic sources about Egypt, both literary and documentary. The work in progress is accessible through the database. We hope to include one day also the Hieroglyphic and the Coptic material. Thirdly, we gather information for the more than 120 000 documents already listed in Trismegistos about the place where they have been found and/or written ; these data are then compiled in spreadsheets illustrating the geographical distribution of the documents, arranged by language and by material (TOP 3). Finally, a lot of modern toponyms from present-day Egypt are plotted on Google maps and linked with the database (<http://www.trismegistos. org/geo/google>). This paper did not focus on the technical side of all this, but mainly on the contents of the files and the sometimes problematic choices to make when entering the data.