 Complete the following phrase:  Eisenstein designed some of the arguably most well-known of these Art Nouveau buildings, several of which are grouped together on Alberta iela Albert Street with other noteworthy buildings by Konstantīns Pēkšēns and Eižens Laube. Since almost no archival or biographical documents remain connected to the life of Eisenstein, his artistic development can only be sketched. It is known that he visited Paris and he may have attended to 