Restoration work at the Stoa of Philip on Delos is stepped up through scheduling and organization so that everything will be ready for the finalized design, the costing of works and the actual restoration phase. The work carried out between April 10 and 20 may appear as non-essential to laypeople, and certainly not impressive, yet more than necessary it is invaluable to all subsequent stages. The monument’s aerial documentation by drone reveals the impressive range of the finds and helps classify them at the currently ongoing  stage, so that one can accurately determine what pieces ‘tie in’ with what in order to make up a complete set. What has not be found will have to be replicated and added. This is the object of the next phase of the design, which will also establish the necessary budget for the project. The recently completed work involved the participation of archaeologists, architects, topographers, draughtspersons and marble technicians.

Specifically, the work carried out between April 10 and 20 entailed:

  1. Land & photogrammetric survey of the monument

The fieldwork involved:

  • Fitting ground control points at suitable locations in the broader area of the Stoa and measuring their coordinates using the high-precision geodesic GPS of the Cyclades Ephorate of Antiquities [CEA].
  • Additional precision measurements of representative linear attributes of the monument were made with a view to ensuring the fully controlled scale of the final outcome (orthophotography).
  • Aerial photography with CEA’s drone in a fully automated process on a high-precision geographic background. The outcome can be described as geometrically optimum, having secured the best flight conditions possible (altitude, aerial photo overlapping, camera positioning, etc.) and comprehensive in terms of the number of photographs—over 1,000, from a low altitude of 10m.

The photogrammetric processing of the images was carried out at a state-of-the-art workstation using CEA’s specialized software to obtain a high-resolution 3D model and orthophoto map integrated into the Greek geodesic reference system.


The fieldwork was carried by the following team:

  • Themistocles Vakoulis, Archaeologist (CEA)
  • Tania Panagou, Archaeologist (CEA)
  • Demetra Mavrokordatou, Architect (CEA)
  • Georgios Papadantonakis, Topographer (General Directorate of Monument Restoration & Technical Projects)
  • Maria Bia, Topographer (CEA)
  • Pavlos Fylaktos, Archaeologist (CEA)
  • Evangelia Tsaknaridou, Draughtsperson (CEA)
  1. Photogrammetric Rendering of architectural fragments

The fieldwork for collecting the data for the photogrammetric rendering of the architectural fragments to be used in the restoration was carried out by the following team:

  • Goulielmos Orestidis, Architect
  • Louisa Anagnostou, Architect
  • Amalia Konidi, Architect

Any necessary repositioning of the architectural fragments for the requirements of photogrammetry were carried out by the following team of marble technicians:

  • Christos Bliyannos
  • Elias SIxas
  • Yannoulis Skaris