A PHP Error was encountered

Severity: 8192

Message: Non-static method Imgsizer::usage() should not be called statically, assuming $this from incompatible context

Filename: imgsizer/pi.imgsizer.php

Line Number: 11

A PHP Error was encountered

Severity: Warning

Message: Cannot modify header information - headers already sent by (output started at /var/sites/i/internationalhotelconferences.com/public_html/system/codeigniter/system/core/Exceptions.php:170)

Filename: core/Common.php

Line Number: 408

- International Hotel Investment Forum -

Founder Patron



Our Publications

Hotel Design Hotel Management Hotel Management Asia


Florian Kollenz

Chief Development Officer, 25hours hotels

Florian Kollenz joined 25hours hotels in 2014 and is in charge of the group’s international expansion. Prior to his role with 25hours, Florian was a Senior Consultant with PKF hotelexperts in Vienna where he oversaw the fields of corporate finance and operator selection. Before that, Florian worked several years for the Austrian Hotel and Tourism Bank after graduating from the University of Applied Sciences in Vienna.