a nacking und b nilsson aalto, alvar * abakanowicz, maria * abramovic, marina * (4) abri, martina abt suger * acconci studio * adam, sheila adams, stevens adrian forty adriani, goetz aenne soell aernout, mik * afanassiev (2) afanassiev, konstantin agam, yaakov * agnes hussein-arco aiken, earl