Many cruise lines have discovered the allure of Europe and have expanded their offerings to this historical part of the world.  Here is our list of the best luxury cruise lines in the world.

Crystal Cruises
Crystal Cruises offers a gracious cruise experience with over-the-top shore excursions. Their restaurants serve menus featuring fresh ingredients, and their bar menus offer premium spirits.

Regent Seven Seas
This cruise line is in the process of revamping its ships and is also purchasing a new ship for delivery before 2012. They are also upgrading their land tours and will offer a “Tour Concierge” to help clients plan their own shore excursions.

Seabourn
Seabourn’s fleet has undergone extensive renovation, and there are more ships to come. The Odyssey is due to enter service for the 2009 season. All suites will feature granite baths with a separate tub and shower, and a flat screen entertainment center. One more ship will debut in 2010 and another in 2011.

Seadream Yacht Club
Seadream operates two 110 guest yachts that are running at almost full capacity. In spite of that, they are refurbishing both ships over the next few years and are planning to expand the fleet. Seadream Yacht Club offers a 5-star experience and an active agenda, for those who want it.

Silversea Cruises
With delivery expected in late 2009, the Silver Spirit will enhance Silversea’s  fleet. The Silver Cloud and Silver Wind will be upgraded this winter and next spring respectively. Their Luxurious Prince Albert II expedition ship has staterooms and suites ranging from 180 to 600 square feet.

Cunard Line (pronounced Kew-naard)
The Queen Elizabeth will enter service in fall of 2011 to complement the new Queen Victoria and its flagship, Queen Mary II. The Cunard Line offers “Grill Class” service that includes butler service, a private lounge and even personal stationery.

Windstar Cruises
This specialized cruise line offers such amenities as luxury linens and mattresses, i-pod nanos, flat screened TVs and much more. They also offer a Signature Collection Series with noted guests and lecturers including wine-makers, artists and writers.