The lectures and workshop will take place at AlbaNova.
Stockholm is located 30 km south of the Airport Arlanda. You can go to Stockholm from Arlanda with either coach or train to the Central station or by taxi. Neither has to be booked in advance. If you take a taxi, ask for flat fare and agree on the price before entering the car. The approximate price is 400 SEK. If you travel by train, go to the Central station in Stockholm. AlbaNova is located in between Stockholm University and Kungliga Tekniska högskolan, see map below.
Further information can be found here.
Map from Eniro: