Create an illustration representing a key figure from Christian texts, traditionally identified as an apostle, standing by the symbolic representation of a divine figure. The apostle should be placed in an ancient Greek city, signifying Ephesus, to empathize faithful followers. The entire art must reflect a strong devotional and respectful spirit towards Christianity. Please adhere to the traditional Byzantine style as this fits the historical context, but interpret it in the modern digital art medium, paying close emphasis on the intricate gold mosaics, halos, and solemn expressions characteristic of Byzantine art.