Creating a suitable image for September was even harder than for August. But one Apostle whom is celebrated in September is St. Mathew the evangelist, and hes feast day is on September the 21:st.
The inspiration for the image came from Matthew 9:9: "And as Jesus passed from thence, he saw a man named Mathew, sitting at the receipt of custom: and he said unto him Follow me. And he arose, and followed him.". This episode make it clear that before he was called to be a disciple of Jesus, he was a publican of the Roman Empire. In the Roman Empire publican was the title given to public contractors.
Some publicans supplied the Roman army with goods and supplies, and they also served as tax collectors. In the later capacity they were tax farmers: they payed a fixed amount to the Emperor or the Senate for the office, and then they had to recuperate that initial loss by extracting taxes from the population to put in their own pockets. The reputation earned by publicans was not good, so they were probably quite aggressive in their tax collection.
After hes call, Matthew invited Jesus for a feast. On seeing this, the Scribes an Pharisees criticized Jesus for eating with tax collectors and sinners. This prompted Jesus to answer " I came not to call the righteous, but sinners to repentance.".
Mathew has an angel as hes attribute, and hence the figurine. He is also the patron saint of accountants, moneylenders, bankers, tax collectors, and people who in general works with money. The coins in the image are there as a reminder of Matthew's early profession.
The composition of this image is fairly simple, but i find it suitable for this topic.