Delegation of the Ismaili Imamat, Ottawa

Royal Embassy of Saudi Arabia in Ottawa (Arabic: سفارة المملكة العربية السعودية الملكية في أتاوا Sifāra al-Mamlaka al-`Arabīya as-Su`ūdīya al-Malikīya fī Uttāwā) is Saudi Arabia's diplomatic mission to Canada. The building is located at 201 Sussex Drive in Ottawa, overlooking the Ottawa River. Prior to 2005, it was located in an office in the Clarica Centre on Bank Street.

The Embassy of Japan in Ottawa (Japanese: 在カナダ日本国大使館 Zai Kanada Nihon-koku Taishikan; French: Ambassade du Japon au Canada) is the diplomatic mission of Japan in Canada. Since 1978 the chancery has been located at 255 Sussex Drive near the Lester B. Pearson Building in Ottawa, Ontario. The ambassadorial residence is at Waterstone (Alan Keefer, architect, built 1928-31), one of Ottawa's largest mansions in Rockcliffe Park. Japan first opened a consulate in Vancouver in 1889 and the embassy opened in 1928. With the outbreak of war, the Japanese diplomats were expelled in 1941 and the embassy was not reopened until 1951. The embassy today also has consulates in Vancouver, Toronto, Montreal, and Calgary. The current ambassador is Yasuhisa Kawamura (川村 泰久 Kawamura Yasuhisa).

The Ottawa Rowing Club (ORC) is a rowing club based in the city of Ottawa, Ontario. It is the oldest continuous rowing club in Canada. It is a registered club with Rowing Canada and Row Ontario.

The Lester B. Pearson Building is an office building in Ottawa, Ontario, Canada. It is located at 125 Sussex Drive in the Lower Town neighbourhood and currently serves as the headquarters of Global Affairs Canada. It was officially opened on 1 August 1973 by Queen Elizabeth II. It is named after Lester B. Pearson, former Prime Minister of Canada and external affairs minister which has earned it the nickname "Fort Pearson". The building was designed by the Toronto-based architectural firm of Webb Zerafa Menkes and is described as "late modern with an influence of Brutalism". The building consists of four "towers" ranging from 4 to 10 storeys, of which three are interconnected from the first to the fifth floor. In 2013, the Department of Public Works and Government Services designated the office complex a Federal Heritage Building for its "historical associations, and its architectural and environmental values".In 2019, work began towards renovating the building, with major changes being made to both the interior and exterior. Walls will be torn down and individual offices removed in favour of a new activity-based working model. The project is estimated to cost $700 million and is scheduled to be completed in 2028.

Earnscliffe is a Victorian manor in Ottawa, Ontario, built in the Gothic Revival style. During the late 19th century, it was home to Canada's first Prime Minister, Sir John A. Macdonald. Since 1930, it has served as the residence of the British High Commissioner to Canada.

The Royal Canadian Mint (French: Monnaie royale canadienne) is the mint of Canada and a Crown corporation, operating under the Royal Canadian Mint Act. The shares of the Mint are held in trust for the Crown in right of Canada. The Mint produces all of Canada's circulation coins, and manufactures circulation coins on behalf of other nations. The Mint also designs and manufactures precious and base metal collector coins; gold, silver, palladium, and platinum bullion coins; medals, as well as medallions and tokens. It further offers gold and silver refinery and assay services. The Mint serves the public's interest but is also mandated to operate "in anticipation of profit" (i.e., to function in a commercial manner without relying on taxpayer support to fund its operations). Like private-sector companies, the Mint has a board of directors consisting of a chair, the president and CEO of the Mint, and eight other directors. Traditionally, the president of the Royal Canadian Mint is known as the Master of the Mint, currently Marie Lemay, who was appointed to the position in 2018. The board of directors, through the chair, is accountable to the Minister of Finance. The Minister serves as the link between the Mint, Cabinet and Parliament. The Mint was named one of "Canada's Top 100 Employers" by Mediacorp Canada Inc. from 2007 to 2010.

The Global Centre for Pluralism (French: Centre mondial du pluralisme) is an international centre for research, education and exchange about the values, practices and policies that underpin pluralist societies. Based in Ottawa, Ontario, Canada, the Centre seeks to assist the creation of successful societies. The Global Centre for Pluralism is an international initiative of Aga Khan IV, 49th hereditary Imam of Ismaili Muslims, and was established jointly with the Government of Canada in 2006. It is located in the former Canadian War Museum building along Ottawa's Sussex Drive and was officially opened with Governor General of Canada, the Right Honourable David Johnston on May 16, 2017.

The Canada School of Public Service was created on April 1, 2004. The School is the main educational institution for the Government of Canada, and is part of the Treasury Board portfolio. It was created from an amalgamation of the following three organizations: the Canadian Centre for Management Development, Training and Development Canada and Language Training Canada.

The Macdonald-Cartier Bridge (French: Pont Macdonald-Cartier) is a bridge connecting Ottawa, Ontario, to Gatineau, Quebec. The bridge is a 618 m long continuous steel box girder bridge and carries six lanes of traffic. It links King Edward Avenue and Sussex Drive in Ottawa with Autoroute 5 in Quebec. It is the easternmost bridge linking Ottawa to Gatineau, running just east of the Alexandra Bridge. The bridge was built from 1963 to 1965 by the federal government and the governments of the two provinces. It is owned and maintained by Public Works and Government Services Canada. It was named after John A. Macdonald and George-Étienne Cartier, joint premiers of the Province of Canada, and the name is representative of the link between French and English Canada. There are sidewalks on both sides of the bridge intended for use by pedestrians and cyclists. Immediately after the bridge on the Gatineau side, the road becomes part of the Autoroute where cyclists and pedestrians are prohibited. However, they can then use paths leading to Laurier Street. The Ottawa side was to connect with Vanier Parkway, and some piers where it would cross the Rideau River remain from the Canadian Pacific Railway's Sussex Street Subdivision, but this was cancelled because the route would have taken much of New Edinburgh Park. Instead, King Edward Avenue was widened up to the one-way pair of St. Patrick Street and Murray Street to the St. Patrick Street Bridge over the Rideau River, which connects with the north end of Vanier Parkway. This provides a four-lane connection between the bridge and Highway 417. Construction is now underway to realign the entrance ramps on the Ontario side, removing any possibility of further extensions.

The Archdiocese of Ottawa–Cornwall (Latin: Archidioecesis Ottaviensis–Cornubiensis, French: L'Archidiocèse d'Ottawa-Cornwall) is a Catholic archdiocese that includes part of the Province of Ontario and includes the suffragan dioceses of Hearst, Pembroke, and Timmins. On 6 May 2020, Pope Francis amalgamated the Archdiocese of Ottawa and the Diocese of Alexandria-Cornwall to create the Archdiocese of Ottawa–Cornwall.The Diocese of Bytown was erected on 25 June 1847. Its name was changed to the Diocese of Ottawa on 14 June 1860. It was elevated to archdiocese status on 8 June 1886. As of 2004, the archdiocese contained 111 parishes, 177 active diocesan priests, 102 religious priests, and 400,000 Catholics. It also has 848 Women Religious, 147 Religious Brothers, and 60 permanent deacons.

The Notre-Dame Cathedral Basilica is a Roman Catholic minor basilica in Ottawa, Ontario, Canada located on 385 Sussex Drive in the Lower Town neighbourhood. It was designated a National Historic Site of Canada in 1990.The basilica is the oldest and largest church in Ottawa and the seat of the city's Roman Catholic archbishop. Its twin spires and gilded Madonna are easily identifiable from nearby Parliament Hill and the surrounding area. The church was last renovated and restored in the late 1990s. Services are held in both French and English. Its Easter and Christmas masses are telecast nationally on Salt+Light Television every year.

The National Gallery of Canada (French: Musée des beaux-arts du Canada), located in the capital city of Ottawa, Ontario, is Canada's national art museum. The museum's building takes up 46,621 square metres (501,820 sq ft), with 12,400 square metres (133,000 sq ft) of space used for exhibiting art. It is one of the largest art museums in North America by exhibition space. The institution was established in 1880 at the Second Supreme Court of Canada building, and moved to the Victoria Memorial Museum building in 1911. In 1913, the Government of Canada passed the National Gallery Act, formally outlining the institution's mandate as a national art museum. The museum was moved to the Lorne building in 1960. In 1988, the museum was relocated to a new building designed for this purpose. The National Gallery of Canada is situated in a glass and granite building on Sussex Drive, with a notable view of the Canadian Parliament buildings on Parliament Hill. The building was designed by Israeli architect Moshe Safdie and opened in 1988.The museum's permanent collection includes over 93,000 works from European, American, and Asian, Canadian, and Indigenous artists. In addition to exhibiting works from its permanent collection, the museum also organizes and hosts a number of travelling exhibitions.