Complex sentence: The marriage was made possible primarily due to the intervention of the Prince of Wales, (subsequently Edward VII) the marriage took place at St Peter's Church, Eaton Square, London, where Queen Victoria was also represented.
Split into simpler sentences: The marriage was made possible primarily due to the intervention of the Prince of Wales, (subsequently Edward VII). The wedding took place at St Peter's Church, Eaton Square, London, where Queen Victoria was also represented.