What's the difference between mansion and mansionry?

Mansion

Definition:

(n.) A dwelling place, -- whether a part or whole of a house or other shelter.
(n.) The house of the lord of a manor; a manor house; hence: Any house of considerable size or pretension.
(n.) A twelfth part of the heavens; a house. See 1st House, 8.
(n.) The place in the heavens occupied each day by the moon in its monthly revolution.
(v. i.) To dwell; to reside.

Example Sentences:

(1) Anti-corruption campaigners have already trooped past the €18.9m mansion on Rue de La Baume, bought in 2007 in the name of two Bongo children, then 13 and 16, and other relatives, in what some call Paris's "ill-gotten gains" walking tour.
(2) Rather than an off-plan Oxshott monster-mansion, he moved his family to an elegant Eaton Terrace townhouse in south-west London.
(3) Real Labour would not just meddle with a cosmetic charge on rich London mansions .
(4) In a statement the Los Angeles County department of public health said: "Though legionella bacteria was identified in a water sample taken from the Playboy Mansion, this bacteria has not been determined as the source of the respiratory outbreak.
(5) Never had I heard anything about what I saw documented so unsparingly in Evan’s photographs: families sleeping in the streets, their clothes in shreds, straw hats torn and unprotecting of the sun, guajiros looking for work on the doorsteps of Havana’s indifferent mansions.
(6) The Lib Dems have campaigned for a "mansion tax" on properties worth more than £2m, to pay for the poorest workers to be lifted out of the tax system.
(7) Here I am sitting in Hampstead, looking at a mansion tax coming towards me and I might not like it, but that’s the deal,” he said.
(8) The party has set out plans to make work pay by introducing a new 10p tax rate to be funded by a mansion tax on properties worth more than £2m.
(9) His home, an hour from Athens, is a mansion replete with large statues, candelabras, paintings on every wall in every room and many images of Jesus.
(10) He hailed the party's commitment to lift low and average earners out of tax, and rounded on those who criticised the Lib Dems' proposed "mansion tax" – a tax on properties worth over £2m – as an attack on "ordinary middle-class owners", saying: "You wonder what part of the solar system they live in."
(11) As the Lib Dems came under their most sustained scrutiny in years, their proposal for a 1% a year "mansion tax" on properties worth more than £2m was questioned by the Institute for Fiscal Studies, which warned that the policy might backfire and raise £330m less than the £1.7bn annually that the party claims it will raise.
(12) But in the Round Room of the Mansion House there must have been at least two thousand others in an improvised Strangers' Gallery.
(13) How Balls achieves his £1.2bn from a mansion tax is a mystery.
(14) Banda's predecessor Bingu wa Mutharika made himself the country's biggest landowner, built a vast mansion with suitcases of cash stashed under the bed, went on two-week-long holidays to Macau and appointed his brother as foreign minister.
(15) A bomb scare on Wednesday prompted a large security operation to be launched on Thursday to protect the former president as he travelled from his mansion on the outskirts of Islamabad.
(16) In his last speech as governor of the Bank of England, King told the Mansion House audience: "I welcome your announcement that Lloyds Banking Group will be returned to private hands soon.
(17) The mansion tax uses Balls’s £3,000 limit up to £3m and charges 0.25% of value thereafter.
(18) A wealthy Russian recently summoned the capital's best commercial lawyers to a Mayfair mansion to bid "for what could potentially be the biggest case of their careers".
(19) They would rather talk about a clodhopping, low-revenue mansion tax that is unlikely to happen than a fair, easy and lucrative extension of council tax, over which they would have less control.
(20) He only had eyes for the Post mansion and Palm Beach.