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On the 10th of September 2014 the 8.5m (28ft) with base EX STRATA #3 was unveiled at the NHL University in Leeuwarden, Netherlands.

EX STRATA is an Interactive Light and Sound Sculpture, globally accessible via Webcam, Internet, Smartphone APPs – inaugurated at the merger of NHL & STENTON Universities in Leeuwarden in the Netherlands

– see and interact with the sculpture at:



In October 2009 the interactive Light and Sound sculpture EX STRATA #1 (4m / 12ft) was unveiled at the “Homo Ludens” exhibition in Leeuwarden, the Netherlands.

Ralfonso worked for over 3 years with the students and teachers of the following technical Universities/Schools: Hanze Hogeschool Groningen, Noordelijke Hogeschool Leeuwarden, TechnologieCentrum Noord-Nederland in conjunction with the BrainCenter of Philips, as well with the technical companies listed on the webpage in order to make this interactive Light and Sound sculpture a reality in 2009.
EX-STRATA; an art object of 4 meters tall you can communicate with!

The EX-STRATA sculpture is equipped with led-lighting and speakers. In response to SMS-messages and activation of the distance sensors by visitors, the sculpture produces light and sound patterns. Through a webcam, the EX-STRATA can be viewed and via the SMS function it can be manipulated from all over the world.

EX STRATA #2 – was installed for the 100 year anniversary of Tsinghua University, Beijing, China LEDs, Internet, Webcam, Computer, Cellular Telephone-SMS, Stainless Steel  5m or 16,5 feet tall