The growth of commerce, too, aided in the formation of these cities, as for the carrying on of trade it was necessary to have centers where the people might come together. These places might at first have been a fair, a temporary affair, but gradually these centers became permanently established or old ones revived. For the carrying on of trade it was necessary to have a medium of exchange and the amount of money was increased by the cities through accumulation and coinage. This gave to the cities a strong means for obtaining freedom, as the lord was ever in need of funds and the cities by accumulating money and having the power to raise a general fund could from time to time buy rights from the lord as his need of money became urgent. In Italy and Germany the cities formed themselves into corporations, the most noted perhaps being the Hanseatic League. In England, however, the cities did not join together, but each stood apart and cared for itself alone. They became really more interested in the welfare of the town itself than in that of the nation and the prosperity of the town was of the most importance. The town could not set aside the law of the land, but it could add to it as far as the government of the town itself was concerned and ordinances were passed relative to the welfare of the town. The officers of these towns considered themselves as very important personages and on occasions of state they arrayed their persons in gorgeous robes and carried themselves with great dignity. These towns erected stately churches and other public buildings and adorned them magnificently. A striking feature of town life of the Middle Ages was the formation of guilds. This was not original with this period for, as told under the chapter on Rome, there were organizations at Rome similar to the guilds of the middle ages and likewise there were similar organizations in Greece. In the medieval period there were two kinds of guilds. The first kind was of a general nature and it was organized for mutual protection or aid, such as protection against thieves and aid in times of sickness, old age, and the like. The second kind was the trade guild, such as formed by merchants and craftsmen. Guilds formed a very important element in the town life of the Middle Ages, as almost all professions and occupations had guilds. The craft guild embraced all the members of a craft--the apprentice, who was bound for service for a number of years to learn the trade; the journeyman, or skilled laborer, who received wages for his work; and the master, who controlled the journeyman and the apprentice. The function of the guild was to regulate and protect the craft and also to help one another and to care for the orphan and the widow and the aged. Officers from their own body were appointed to carry out the regulations and to have general oversight of the organization.