Although the commercial activities of merchants gave rise to commercial cities and towns, these towns began to face unprecedented problems. These problems are similar to those faced by modern day urban cities; they included contagious disease, overcrowding and crime. Hope this helps. Have a nice day.
violence (crimes), plague, famine, heresy (no freedom of speech, it could be dangerous to let important people know your opinion) and sometimes bad weather conditions could be bad for their buildings
