Prooptiki successfully organized the Cross-Border Tax Workshop of Integra International in Athens. The workshop was held on September 11, 2010, while the topic was "Permanenent Establishment" and realated tax issues.

Integra members from the following countries participated at the Cross Border Tax Workshop:
- Austria
- Cyprus
- Germany
- Greece
- Italy
- The Netherlands
- Spain
- Switzerland
- United Kingdom

On Friday night, Prooptiki hosted a Welcome dinner at its offices' Roof . Our Integra guests, associates and staff had the opportunity to discuss and enjoy their evening with homemade Greek food and desserts under the light of the Acropolis.