Close view of bay window (by use of subtractive process); The last phase in Sullivan's career was largely devoted to designing banks in small towns in the Midwest. Midwestern agriculture thrived in the early 20th century, leading to a revolution in rural banking and the proliferation of small institutions sympathetic to local needs. These buildings posed no problems in the expression of structure, as they were all low, load-bearing brick constructions; they did, however, raise important questions of institutional expression. Sullivan's solution was to make them monumental, as befitted banks, but 'modern' and unrelated to historical precedent in order to communicate their transformed character. They are the final and most richly impressive d...