The German artist Winold Reiss was born into a family of artists. A portraitist, he believed that an artist must travel to find fascinating subjects. Reiss immigrated to New York in 1913, hoping to encounter some Native Americans, and in 1920 he lived for some months on the Blackfeet Reservation and painted many members of its community. Reiss grew prominent and his works appeared in the country’s Great Northern calendars. His modernist style had a European flair, and the interiors he designed nodded to the Vienna Secession. This show of 150 works, many never before exhibited, includes portraits of Harlem Renaissance figures such as Zora Neale Hurston and Langston Hughes. —Elena Clavarino