The Viharamahadevi Park (formerly Victoria Park) is a public park located in Colombo, next to the National Museum in Sri Lanka.
 It is the oldest and largest park of the Port of Colombo.
 Situated in front of the colonial-era Town Hall building, the park is named after Queen Viharamahadevi, the mother of King Dutugamunu.
 The park was built on land donated to the Colombo city by Charles Henry de Soysa during the British rule of Sri Lanka, and used to be named "Victoria Park" after Queen Victoria.
 During World War II it was occupied by the British Army with Australian 17th Brigade based at Victoria Park.
 After the war the park was restored and open to the public in 1951.
Lochend Park is a public park in Edinburgh, Scotland.
 It is situated in the Lochend / Restalrig area, next to Lochend Castle and near Meadowbank Stadium.
 The loch with its wide range of waterfowl is the main attraction, but there are also historical buildings, a children's play area, and sports areas.
 The park was awarded a Green Flag in 2012 in recognition of it being a quality greenspace.
 Within the park there is a 16th-century doocot which is Category B listed.
Armley Park, (also known as Gott's Park), is a large public park located next to Stanningley Road in Armley, on the outskirts of Leeds, in West Yorkshire, Northern England.
Köllnischer Park is a public park located near the River Spree in Mitte, Berlin.
 It is named after Cölln, one of the two cities which came together to form Berlin; the park location was originally just outside it.
 Approximately 1 ha in area, the park came into existence in the 18th and 19th centuries on the site of fortifications.
 It was redesigned as a public park in 1869–73 and was further modified in the 20th century with the addition of first a bear enclosure, the Bärenzwinger, and later a permanent exhibition of sculpture, the Lapidary.
 The park is a registered Berlin landmark.
The Park at River Walk (also known as "River Walk Park") is a public park located in Bakersfield, California.
 The park is 32 acre , and contains two lakes connected by a stream.
 It is also the location of the Spectrum Amphitheater (formally known as the Bright House Amphitheater, before the company's corporate restructuring in August 2016), one of two large outdoor theaters in Bakersfield (the other is the Outdoor Theater at Bakersfield College).
 The park is located next to the Kern River Bike Trail.
 It is also located near the Calloway Drive Interchange for the Westside Parkway.
Margaret T. Hance Park is a public park above the Papago Freeway Tunnel in Phoenix, Arizona.
 It is named after Margaret Hance, who was the first female mayor of the city and advocate for the park.
 The park is located next to the Phoenix Center For The Arts, Ro Ho En, and Kenilworth Elementary School.
 In 2016, it was announced that the park would undergo a ten-year $118 million face lift, which would add an Amphitheatre and skate park, amongst other things.
 As a part of the fixes, two historic trolleys will be moved from their current spot at the Phoenix Trolley Museum to an unknown location.
Preston Park (officially referred to as Preston Hall Park) is a 100 acre public park located next to the River Tees, in Preston-on-Tees, England.
 It is highly popular and it hosts many events each year that attract people from across Teesside and further afield.
 Although parking for both the museum, grounds and Butterfly world is free, the museum itself charges £2 for an adult admission.
Victoria Park is a public park located just to the north of Portsmouth Guildhall, adjacent to Portsmouth and Southsea railway station and close to the city centre in Portsmouth, Hampshire.
 It was officially opened on 25 May 1878 and was the first public park to be opened in Portsmouth.
 It was designed by Alexander McKenzie.
 It has a total area of around 15 acre and is planted with trees, shrubs and flowers.
 The centre of the park features an enclosed area which inhabits animals such as birds, rabbits and guinea pigs.
Burke Lake Park is a public park located in Fairfax county, Fairfax County, Virginia, United States.
 It encompasses Burke Lake.
 The Fairfax County public park is owned by the Fairfax County Park Authority (FCPA).
 It was built on land that was purchased by the federal government in the 1950s for an international airport, before the site of Dulles Airport was chosen as a replacement.
Lochend House, also known as Restalrig Castle and Lochend Castle, is an occupied house, incorporating the remains of a 16th-century L-plan tower house, in Edinburgh, Scotland.
 It is located in the Lochend area, about 1.5 mi east of Edinburgh Castle.
 The house is protected as a category B listed building.

Question: Lochend Park is a public park located next to a castle that is protected under which category ?
Answer: category B