If you look for accommodation, preferable areas are: Bica, Chiado, Principe Real, Baixa, Bairro Alto – all at walking distance from the conference venues. Here are few suggestions, including hotels and apartments.

          A few hotels:

Duas Nações

Evidencia Light Sta. Catarina Hotel

Aljubarrota Guest House

Pensão Estação Central

MyRoom Lisboa

BonsDias

           Luxury hotel:

Hotel Bairro Alto

          Apartments:

1 bedroom/ 2p, 40€ night if you contact directly: lisbonwindow@gmail.com
see photo here: https://www.airbnb.pt/rooms/1322354

2 bedrooms + living room, from 67€/ night
http://pt.rentalia.com/267475

1 bedroom + living room, 2 persons, from 53€/ night
http://pt.rentalia.com/244555