The International Conferences Geometrias are organized by the Portuguese Association of Geometry and Drawing Teachers (Aproged) and aim to bring together academics, artists, researchers, scientists and students to share their investigations and practical experiments related to the leitmotiv of each edition, that is closely connected to Geometry through a broad panorama of topics.
The first conference Geometrias’13 took place in 2013, in the Faculty of Architecture of Porto’s University; and Geometrias’14 at ISCTE, in the University Institute of Lisbon, with “New challenges on practice, researching and teaching Geometries and Drawing” as engaging theme. The 2015’s edition, held in Lisbon’s’ Lusíada University, was a joint Conference between Geometrias and the Brazilian Graphica, gathered under the theme “Trends on Graphic Thinking”.  Geometrias’17 took place in the Department of Architecture of Coimbra’s University with “Thinking, Drawing, Modelling” as leitmotiv.

In 2019, Geometrias will be held in the Department of Mathematics of the Faculty of Sciences of Porto’s University with the intent of fostering interdisciplinary discussions and connections between theoretical researches and practical studies on polyhedra and geometric structures and its applications in architecture, arts, computer science, crystallography, design, education, engineering, mathematics, materials science and other related fields of study, that we believe might enrich each other and renew common interests on these subjects through networks of common inspirations. In addition to the papers and posters' sessions and the six plenary lectures of notable Keynote Speakers, there will be a Session dedicated to different Workshops with hands-on activities.  
We invite academics, artists, researchers, scientists and students to participate in the Call for Abstracts occurring between 15 October 2018 and 15 March 2019 30 March 2019, submitting, through EasyChair, an extended abstract on investigations or practices addressing the conference's theme: Polyhedra and Beyond.

The drawing in the rightmost upper image is almost an exact representation of the great stellated dodecahedron inside a regular icosahedron.
Jamnitzer. W., 1568. Perspectiva Corporum Regularium