Ikariam v 0.5.4 : Tower Ruin - Helios Tower

I only noticed the recent Ikariam update when I clicked on the island view. Below are the features and the changes made in the update.

• Feature - As of now, on every island there is a special building slot for a Helios Tower. All players can purchase this building for Ambrosia. The buyer can select from multiple options to determine the appearance of the tower. The building is persistent in the world and contains the name of the player (even after deletion). The building includes a set three-week bonus which increases the production of both resources on the island by 10% for all players that are on said island. Each player can extend the bonus by seven days using an Ambrosia payment. It can also be reactivated for this time frame, if it has already expired.
• Change - The storage capacity of the town hall has been increased to 2,500 per resource. Additionally, the amount of resources that can be transported when colonizing has also been increased to 2,500.

The image below is what the Tower Ruin looks like.

So, in exchange for ambrosia, the advantage would be resource bonus production - but this is shared by all players on the island - and an Ikariam imprint (which will exist even after the player's account has been deleted).